protective blanket 选择The atmosphere again acts our protective blanket on _____[A] stars[B] sun[C] earth[D] space
题目
protective blanket 选择
The atmosphere again acts our protective blanket on _____
[A] stars
[B] sun
[C] earth
[D] space
相似考题
更多“protective blanket 选择 Theatmosphereagainactsourprotectiveblanketon_____[A]stars[B]sun[C]earth[D]space”相关问题
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第1题：
Text 2 To understand how astrology works, we should first take a quick look at the sky. Although the stars are at enormous distances, they do indeed give the impression of being affixed to the inner surface of a great hollow sphere surrounding the earth. Ancient people, in fact, literally believed in the existence of such a celestial sphere. As the earth spins on its axis, the celestial sphere appears to turn about us each day, pivoting at points on a line with the earth's axis of rotation. This daily turning of the sphere carries the stars around the sky, causing most of them to rise and set, but they, and constellations they define, maintains fixed patterns on the sphere, just as the continent of Australian maintains its shape on a spinning globe of the earth. Thus the stars were called fixed stars.
The motion of the sun along the ecliptic is, of course, merely a reflection of the revolution of the earth around the sun, but the ancients believed the earth was fixed and the sun had an independent motion of its own, eastward among the stars. The glare of sunlight hides the stars in daytime, but the ancients were aware that the stars were up there even at night, and the slow eastward motion of the sun around the sky, at the rate of about thirty degrees each month, caused different stars to be visible at night at different times of the year.
The moon, revolving around the earth each month, also has an independent motion in the sky. The moon, however, changes its position relatively rapidly. Although it appears to rise and set each day, as does nearly everything else in the sky, we can see the moon changing position during as short an interval as an hour or so. The moon's path around the earth lies nearly in the same plane as the earth's path around the sun, so the moon is never seen very far from the ecliptic in the sky. There are five other objects visible to the naked eye that also appear to move in respect to the fixed background of stars on the celestial sphere. These are the planets Mercury, Venus, Mars, Jupiter, and the Saturn. All of them revolve around the sun in nearly the same plane as the earth does, so they, like the moon, always appear near the ecliptic. Because we see the planets from the moving earth, however, they behave in a complicated way, with their apparent motions on the celestial sphere reflection both their own independent motions around the sun and our motion as well.
第26题：The ancient people believed that ________.
[A] the earth was spinning on the axis of the sky
[B] the sky was a hollow sphere spinning around the earth
[C] the patterns of stars on the sky would never change
[D] the stars around the sky were not stationary
正确答案：C
根据第一段最后两句话，我们可以看出古人认为是地球的转动带动了群星的转动，而事实上群星在天空中是恒定的。于是，正确答案应为C。 -
第2题：
penetrate the 7选择makes our environments tolerable and some ultraviolet rays (紫外线) penetrate the ____
[A] environment
[B] space
[C] atmosphere
[D] earth
是完型填空吧？你要把整篇都传上来这样片面的截句无法给出答案。
-
第3题：
The long‐awaited Hubble Space Telescope,due（ ）orbit the Earth next March,will observe some of the oldest stars in the sky.
to答案：解析：due to“定于，预计”。句意：人们期待已久的哈勃望远镜将在三月进入地球轨道，观测天空中最古老的星球。 -
第4题：
Space is a dangerous place,not only because of meteors but also because of rays from the sun?and other stars.The atmosphere again acts as our protective blanket on earth.Light gets through,and?this is essential for plants to make the food which we eat.Heat,too,makes our environment endurable.Various kinds of rays come through the air from outer space,but enormous quantities of radiation from the sun are screened off.As soon as men leave the atmosphere they are exposed to this radiation.But their spacesuits or the walls of their spacecraft,if they are inside,do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space.The unit of radiation is called"rein".Scientists have reason to think that a man can put up with far more radiation than 0.1 rem?without being damaged;the figure of 60 rems has been agreed on.The trouble is that it is extremely?difficult to be sure about radiation damage—a person may feel perfectly well,but the cells of his or?her sex organs may be damaged,and this will not be discovered until the birth of deformed(畸形的)children or even grandchildren.Missions of the Apollo flights have had to cross belts of high radiation?and,during the outward and return journeys,the Apollo crew accumulated a large amount of rems.So?far,no dangerous amounts of radiation have been reported,but the Apollo missions have been quite?short.We simply do not know yet how men are going to get on when they spend weeks and months?outside the protection of the atmosphere,working in a space laboratory.Drugs might help to decrease?the damage done by radiation,but no really effective ones have been found so far.
It can be inferred from the passage that__A.the Apollo mission was very successful
B.protection from space radiation is no easy job
C.astronauts will have deformed children or grandchildren
D.radiation is not a threat to well-protected space explorers答案：B解析：【考情点拨】推理判断题。【应试指导】由最后一句“Drugs might…but no?really effective ones have been found So far．”可知，目前人类还没有找到有效的方法去避免辐射的危害，所以免受辐射危害并非易事，故选B。 -
第5题：
Space is a dangerous place,not only because of meteors but also because of rays from the sun?and other stars.The atmosphere again acts as our protective blanket on earth.Light gets through,and?this is essential for plants to make the food which we eat.Heat,too,makes our environment endurable.Various kinds of rays come through the air from outer space,but enormous quantities of radiation from the sun are screened off.As soon as men leave the atmosphere they are exposed to this radiation.But their spacesuits or the walls of their spacecraft,if they are inside,do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space.The unit of radiation is called"rein".Scientists have reason to think that a man can put up with far more radiation than 0.1 rem?without being damaged;the figure of 60 rems has been agreed on.The trouble is that it is extremely?difficult to be sure about radiation damage—a person may feel perfectly well,but the cells of his or?her sex organs may be damaged,and this will not be discovered until the birth of deformed(畸形的)children or even grandchildren.Missions of the Apollo flights have had to cross belts of high radiation?and,during the outward and return journeys,the Apollo crew accumulated a large amount of rems.So?far,no dangerous amounts of radiation have been reported,but the Apollo missions have been quite?short.We simply do not know yet how men are going to get on when they spend weeks and months?outside the protection of the atmosphere,working in a space laboratory.Drugs might help to decrease?the damage done by radiation,but no really effective ones have been found so far.
The best title for this passage would be__A.The Atmosphere and Our Environment
B.Research on Radiation
C.Effects of Space Radiation
D.Importance of Protection Against Radiation答案：C解析：【考情点拨】主旨大意题。【应试指导】通读全文可知，文章开头提到，宇宙空间里存在很多辐射，第二段又紧紧围绕辐射对人类的影响展开论述。C项符合题意，故选C。 -
第6题：
共用题干
Early Ideas about the Universe
1 Early man got his ideas about the universe by looking at the stars as you do.He
observed carefully,and learned many things about the sun,the moon,and the stars.
2 Suppose you were asked to collect evidence about the sun as early man did.You might
go out morning after morning and see it come up in the east.Even on cloudy mornings,you
would observe that the darkness goes away and the world becomes light.You might not see
the sun but would be sure it is there,because you notice that the earth warms up.As you
continued,the sun climbs higher in the sky each day during part of the year. It stays in the
sky longer. The earth gets warmer. Things begin to grow. It is spring and then summer.
3 After a while the sun stays in the sky for shorter and shorter periods.Many plants begin
to die.Leaves fall.Winter comes.Year after year this is repeated and you cannot tell
exactly why it happens.But you realize that the sun seems to make the difference.
Primitive（原始的）man felt that since the sun was so powerful it must be a god. It may
seem silly to us now to worship（崇拜）a sun-god, but primitive man was right about the
importance of the sun to life on earth.
4 You have been told that the world is round.But suppose no one had ever taught you
that the world was like a huge ball.Would you have ever thought of it yourself?You cannot
see the curve（曲线）of the earth at once. You would have no idea of how big it was.
That's why early man believed that the earth was small and flat.Such ideas appeared from
the evidence they had.
5 If you watch the stars night after night,you will see them rise and set.As you look at
the sky,it is not difficult to imagine that you are in the center of a vast collection of twinkling
（闪烁）lights. Some early astronomers（天文学家）believed the sky was a crystal shell or
series of crystal shells,one inside the other. They believed this because that is what the
night sky looked like.For many centuries,men believed that the earth was the center of
the universe and that the sun,the moon,and the stars circled around it.Early man thought the earth was small and flat because_________.
A:he did not observe the sun carefully enough
B:he could not see its curve
C:the sun,the moon and the stars seemed to move around it
D:the earth circles around the sun
E:it looked like that at night
F:it has power over life on earth答案：B解析： -
第7题：
共用题干
So Many"Earths"
The Milky Way（银河）contains billions of Earth-sized planets that could support life.That's the finding of a new study.It draws on data that came from NASA's top planet-hunting telescope.
A mechanical failure recently put that Kepler space telescope out of service.Kepler had played a big role in creating a census of planets orbiting some 170,000 stars.Its data have been helping astronomers predict how common planets are in our galaxy.The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study,published in The Proceedings of the National Academy of Sciences,conclude that between 14 and 30 out of every 100 stars,with a mass and temperature similar to the Sun,may host a planet that could support life as we know it.Such a planet would have a diameter at least as large as Earth's,but no more than twice that big.The planet also would have to orbit in a star's habitable zone.That's where the surface temperature would allow any water to exist as a liquid.
The new estimate of how many planets might fit these conditions comes from studying more than 42,000 stars and identifying suitable worlds orbiting them.The scientists used those numbers to extrapolate（推算） to the rest of the stars that the telescope could not see.
The estimate is rough,the authors admit.If applied to the solar system,it would define as habitable a zone starting as close to the Sun as Venus and running to as far away as Mars.Neither planet is Earthlike (although either might have been in the distant past).Using tighter limits,the researchers estimate that between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world.These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesn't sound like a big number.It would mean,however,that the Milky Way could host more than a billion Earth-sized planets with a chance for life.The new finding is based on a thorough study of 170,000 stars in the Milky Way.
A:Right
B:Wrong
C:Not mentioned答案：B解析：本篇文章只在第二段第一句表明，近来一次机械故障使开普勒太空望远镜不再为我们服务，并没有提到开普勒太空望远镜为我们服务了多少年。
第二段最后一句表明，开普勒太空望远镜主要寻找与地球有相似环境的星球。
第三段第二句表明，可让生命存在的星球的直径至少与地球的直径一样大，但不会超过地球直径的两倍。由此可推测出其不会比地球小，因此题干表述错误。
第三段第三、四句表明，适合生命存在的星球必须与它所环绕的恒星有一个合适的距离，以保证星球表面的温度允许液态水存在，而地球正是适合人类居住的星球，而且地球是绕着太阳运行的。
第四段第一句表明，这项新评估源于对超过4.2万颗星球的分析，而非源于对17万颗星球的分析。
第五段第一句表明，研究者承认这项评估是粗糙的，即不精确的。
文章第一段指出，这次的调查结果是新的发现，但通篇文章并未提到这是对可能有生命存在的星球的首次研究。 -
第8题：
共用题干
So Many"Earths"
The Milky Way（银河）contains billions of Earth-sized planets that could support life.That's the finding of a new study.It draws on data that came from NASA's top planet-hunting telescope.
A mechanical failure recently put that Kepler space telescope out of service.Kepler had played a big role in creating a census of planets orbiting some 170,000 stars.Its data have been helping astronomers predict how common planets are in our galaxy.The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study,published in The Proceedings of the National Academy of Sciences,conclude that between 14 and 30 out of every 100 stars,with a mass and temperature similar to the Sun,may host a planet that could support life as we know it.Such a planet would have a diameter at least as large as Earth's,but no more than twice that big.The planet also would have to orbit in a star's habitable zone.That's where the surface temperature would allow any water to exist as a liquid.
The new estimate of how many planets might fit these conditions comes from studying more than 42,000 stars and identifying suitable worlds orbiting them.The scientists used those numbers to extrapolate（推算） to the rest of the stars that the telescope could not see.
The estimate is rough,the authors admit.If applied to the solar system,it would define as habitable a zone starting as close to the Sun as Venus and running to as far away as Mars.Neither planet is Earthlike (although either might have been in the distant past).Using tighter limits,the researchers estimate that between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world.These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesn't sound like a big number.It would mean,however,that the Milky Way could host more than a billion Earth-sized planets with a chance for life.This is the first research finding about the planets with a chance for life.
A:Right
B:Wrong
C:Not mentioned答案：C解析：本篇文章只在第二段第一句表明，近来一次机械故障使开普勒太空望远镜不再为我们服务，并没有提到开普勒太空望远镜为我们服务了多少年。
第二段最后一句表明，开普勒太空望远镜主要寻找与地球有相似环境的星球。
第三段第二句表明，可让生命存在的星球的直径至少与地球的直径一样大，但不会超过地球直径的两倍。由此可推测出其不会比地球小，因此题干表述错误。
第三段第三、四句表明，适合生命存在的星球必须与它所环绕的恒星有一个合适的距离，以保证星球表面的温度允许液态水存在，而地球正是适合人类居住的星球，而且地球是绕着太阳运行的。
第四段第一句表明，这项新评估源于对超过4.2万颗星球的分析，而非源于对17万颗星球的分析。
第五段第一句表明，研究者承认这项评估是粗糙的，即不精确的。
文章第一段指出，这次的调查结果是新的发现，但通篇文章并未提到这是对可能有生命存在的星球的首次研究。 -
第9题：
共用题干
Early Ideas about the Universe
1 Early man got his ideas about the universe by looking at the stars as you do.He
observed carefully,and learned many things about the sun,the moon,and the stars.
2 Suppose you were asked to collect evidence about the sun as early man did.You might
go out morning after morning and see it come up in the east.Even on cloudy mornings,you
would observe that the darkness goes away and the world becomes light.You might not see
the sun but would be sure it is there,because you notice that the earth warms up.As you
continued,the sun climbs higher in the sky each day during part of the year. It stays in the
sky longer. The earth gets warmer. Things begin to grow. It is spring and then summer.
3 After a while the sun stays in the sky for shorter and shorter periods.Many plants begin
to die.Leaves fall.Winter comes.Year after year this is repeated and you cannot tell
exactly why it happens.But you realize that the sun seems to make the difference.
Primitive（原始的）man felt that since the sun was so powerful it must be a god. It may
seem silly to us now to worship（崇拜）a sun-god, but primitive man was right about the
importance of the sun to life on earth.
4 You have been told that the world is round.But suppose no one had ever taught you
that the world was like a huge ball.Would you have ever thought of it yourself?You cannot
see the curve（曲线）of the earth at once. You would have no idea of how big it was.
That's why early man believed that the earth was small and flat.Such ideas appeared from
the evidence they had.
5 If you watch the stars night after night,you will see them rise and set.As you look at
the sky,it is not difficult to imagine that you are in the center of a vast collection of twinkling
（闪烁）lights. Some early astronomers（天文学家）believed the sky was a crystal shell or
series of crystal shells,one inside the other. They believed this because that is what the
night sky looked like.For many centuries,men believed that the earth was the center of
the universe and that the sun,the moon,and the stars circled around it.Primitive man believed the sun was a god because_________.
A:he did not observe the sun carefully enough
B:he could not see its curve
C:the sun,the moon and the stars seemed to move around it
D:the earth circles around the sun
E:it looked like that at night
F:it has power over life on earth答案：F解析： -
第10题：
共用题干
So Many"Earths"
The Milky Way（银河）contains billions of Earth-sized planets that could support life.That's the finding of a new study.It draws on data that came from NASA's top planet-hunting telescope.
A mechanical failure recently put that Kepler space telescope out of service.Kepler had played a big role in creating a census of planets orbiting some 170,000 stars.Its data have been helping astronomers predict how common planets are in our galaxy.The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study,published in The Proceedings of the National Academy of Sciences,conclude that between 14 and 30 out of every 100 stars,with a mass and temperature similar to the Sun,may host a planet that could support life as we know it.Such a planet would have a diameter at least as large as Earth's,but no more than twice that big.The planet also would have to orbit in a star's habitable zone.That's where the surface temperature would allow any water to exist as a liquid.
The new estimate of how many planets might fit these conditions comes from studying more than 42,000 stars and identifying suitable worlds orbiting them.The scientists used those numbers to extrapolate（推算） to the rest of the stars that the telescope could not see.
The estimate is rough,the authors admit.If applied to the solar system,it would define as habitable a zone starting as close to the Sun as Venus and running to as far away as Mars.Neither planet is Earthlike (although either might have been in the distant past).Using tighter limits,the researchers estimate that between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world.These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesn't sound like a big number.It would mean,however,that the Milky Way could host more than a billion Earth-sized planets with a chance for life.The Kepler space telescope has been in service for 15 years.
A:Right
B:Wrong
C:Not mentioned答案：C解析：本篇文章只在第二段第一句表明，近来一次机械故障使开普勒太空望远镜不再为我们服务，并没有提到开普勒太空望远镜为我们服务了多少年。
第二段最后一句表明，开普勒太空望远镜主要寻找与地球有相似环境的星球。
第三段第二句表明，可让生命存在的星球的直径至少与地球的直径一样大，但不会超过地球直径的两倍。由此可推测出其不会比地球小，因此题干表述错误。
第三段第三、四句表明，适合生命存在的星球必须与它所环绕的恒星有一个合适的距离，以保证星球表面的温度允许液态水存在，而地球正是适合人类居住的星球，而且地球是绕着太阳运行的。
第四段第一句表明，这项新评估源于对超过4.2万颗星球的分析，而非源于对17万颗星球的分析。
第五段第一句表明，研究者承认这项评估是粗糙的，即不精确的。
文章第一段指出，这次的调查结果是新的发现，但通篇文章并未提到这是对可能有生命存在的星球的首次研究。 -
第11题：
单选题Opposition occurs when（）.Athe Sun，Earth，and Moon are at right angles
Bthe Sun's declination is 0°and is moving south
Can inferior planet is at the maximum angle to the line of sight to the Sun
Dthe Earth is between a planet and the Sun
正确答案： C解析： 暂无解析 -
第12题：
单选题Spring tides occur（）.Aat the start of spring，when the Sun is nearly over the equator
Bonly when the Sun and Moon are on the same side of the Earth and nearly in line
Cwhen the Sun and Moon are at approximately 90°to each other as seen from the Earth
Dwhen the Sun，Moon，and Earth are nearly in line，in any order
正确答案： A解析： 暂无解析 -
第13题：
All the other five planets ________.
[A] always appear near the path of the sun
[B] are moving in a way more complicated than the earth does
[C] aren't moving around the sun as independently as the earth does
[D] are moving around the sun at the same speed as the earth does
正确答案：B
文章最后一句话提到“Because we see the planet from the moving earth，however，they behave in a complicated way，...”，说明行星的运行更为复杂。所以B应为正确答案。 -
第14题：
to explorers in 选择Radiation is the greatest known danger to explorers in _________
[A] earth
[B] atmosphere
[C] space
[D] environment
是完型填空吧？你要把整篇都传上来这样片面的截句无法给出答案。
-
第15题：
Space is a dangerous place,not only because of meteors but also because of rays from the sun?and other stars.The atmosphere again acts as our protective blanket on earth.Light gets through,and?this is essential for plants to make the food which we eat.Heat,too,makes our environment endurable.Various kinds of rays come through the air from outer space,but enormous quantities of radiation from the sun are screened off.As soon as men leave the atmosphere they are exposed to this radiation.But their spacesuits or the walls of their spacecraft,if they are inside,do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space.The unit of radiation is called"rein".Scientists have reason to think that a man can put up with far more radiation than 0.1 rem?without being damaged;the figure of 60 rems has been agreed on.The trouble is that it is extremely?difficult to be sure about radiation damage—a person may feel perfectly well,but the cells of his or?her sex organs may be damaged,and this will not be discovered until the birth of deformed(畸形的)children or even grandchildren.Missions of the Apollo flights have had to cross belts of high radiation?and,during the outward and return journeys,the Apollo crew accumulated a large amount of rems.So?far,no dangerous amounts of radiation have been reported,but the Apollo missions have been quite?short.We simply do not know yet how men are going to get on when they spend weeks and months?outside the protection of the atmosphere,working in a space laboratory.Drugs might help to decrease?the damage done by radiation,but no really effective ones have been found so far.
We know from the passage that__A.exposure to even tiny amounts of radiation is fatal
B.the effect of exposure to radiation is slow in coming
C.radiation is avoidable in space exploration
D.astronauts in spacesuits needn't worry about radiation damage答案：B解析：【考情点拨】推理判断题二【应试指导】由第二段第四句可知，辐射对人体的危害一时难以显现，它可能会在其子女或孙子女的身上体现出来。B项符合题意，故选B。 -
第16题：
Space is a dangerous place,not only because of meteors but also because of rays from the sun?and other stars.The atmosphere again acts as our protective blanket on earth.Light gets through,and?this is essential for plants to make the food which we eat.Heat,too,makes our environment endurable.Various kinds of rays come through the air from outer space,but enormous quantities of radiation from the sun are screened off.As soon as men leave the atmosphere they are exposed to this radiation.But their spacesuits or the walls of their spacecraft,if they are inside,do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space.The unit of radiation is called"rein".Scientists have reason to think that a man can put up with far more radiation than 0.1 rem?without being damaged;the figure of 60 rems has been agreed on.The trouble is that it is extremely?difficult to be sure about radiation damage—a person may feel perfectly well,but the cells of his or?her sex organs may be damaged,and this will not be discovered until the birth of deformed(畸形的)children or even grandchildren.Missions of the Apollo flights have had to cross belts of high radiation?and,during the outward and return journeys,the Apollo crew accumulated a large amount of rems.So?far,no dangerous amounts of radiation have been reported,but the Apollo missions have been quite?short.We simply do not know yet how men are going to get on when they spend weeks and months?outside the protection of the atmosphere,working in a space laboratory.Drugs might help to decrease?the damage done by radiation,but no really effective ones have been found so far.
According to the first paragraph,the atmosphere is essential to man in that__________.A.it protects him against the harmful rays from space
B.it provides sufficient light for plant growth
C.it supplies the heat necessary for human survival
D.it screens off the falling meteors答案：A解析：【考情点拨】推断判断题。【应试指导】由第一段可知，由于流星和来自太阳及其他星体的射线。使得宇宙空间成为危险之地，而大气层可以充当地球的保护毯。由此可知，大气层在保护人类不受有害射线的辐射方面至关重要．故选A。 -
第17题：
共用题干
Early Ideas about the Universe
1 Early man got his ideas about the universe by looking at the stars as you do.He
observed carefully,and learned many things about the sun,the moon,and the stars.
2 Suppose you were asked to collect evidence about the sun as early man did.You might
go out morning after morning and see it come up in the east.Even on cloudy mornings,you
would observe that the darkness goes away and the world becomes light.You might not see
the sun but would be sure it is there,because you notice that the earth warms up.As you
continued,the sun climbs higher in the sky each day during part of the year. It stays in the
sky longer. The earth gets warmer. Things begin to grow. It is spring and then summer.
3 After a while the sun stays in the sky for shorter and shorter periods.Many plants begin
to die.Leaves fall.Winter comes.Year after year this is repeated and you cannot tell
exactly why it happens.But you realize that the sun seems to make the difference.
Primitive（原始的）man felt that since the sun was so powerful it must be a god. It may
seem silly to us now to worship（崇拜）a sun-god, but primitive man was right about the
importance of the sun to life on earth.
4 You have been told that the world is round.But suppose no one had ever taught you
that the world was like a huge ball.Would you have ever thought of it yourself?You cannot
see the curve（曲线）of the earth at once. You would have no idea of how big it was.
That's why early man believed that the earth was small and flat.Such ideas appeared from
the evidence they had.
5 If you watch the stars night after night,you will see them rise and set.As you look at
the sky,it is not difficult to imagine that you are in the center of a vast collection of twinkling
（闪烁）lights. Some early astronomers（天文学家）believed the sky was a crystal shell or
series of crystal shells,one inside the other. They believed this because that is what the
night sky looked like.For many centuries,men believed that the earth was the center of
the universe and that the sun,the moon,and the stars circled around it.Paragraph 2_________
A:Early Ideas about the Sky and the Stars
B:The Importance of the Sun to Life on Earth
C:Primitive Knowledge of the Moon
D:The Sun in Autumn and Winter
E:Early Ideas about the Earth
F:Collecting Evidence about the Sun答案：F解析： -
第18题：
共用题干
So Many"Earths"
The Milky Way（银河）contains billions of Earth-sized planets that could support life.That's the finding of a new study.It draws on data that came from NASA's top planet-hunting telescope.
A mechanical failure recently put that Kepler space telescope out of service.Kepler had played a big role in creating a census of planets orbiting some 170,000 stars.Its data have been helping astronomers predict how common planets are in our galaxy.The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study,published in The Proceedings of the National Academy of Sciences,conclude that between 14 and 30 out of every 100 stars,with a mass and temperature similar to the Sun,may host a planet that could support life as we know it.Such a planet would have a diameter at least as large as Earth's,but no more than twice that big.The planet also would have to orbit in a star's habitable zone.That's where the surface temperature would allow any water to exist as a liquid.
The new estimate of how many planets might fit these conditions comes from studying more than 42,000 stars and identifying suitable worlds orbiting them.The scientists used those numbers to extrapolate（推算） to the rest of the stars that the telescope could not see.
The estimate is rough,the authors admit.If applied to the solar system,it would define as habitable a zone starting as close to the Sun as Venus and running to as far away as Mars.Neither planet is Earthlike (although either might have been in the distant past).Using tighter limits,the researchers estimate that between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world.These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesn't sound like a big number.It would mean,however,that the Milky Way could host more than a billion Earth-sized planets with a chance for life.The planet that could support life might be a little bit smaller than Earth.
A:Right
B:Wrong
C:Not mentioned答案：B解析：本篇文章只在第二段第一句表明，近来一次机械故障使开普勒太空望远镜不再为我们服务，并没有提到开普勒太空望远镜为我们服务了多少年。
第二段最后一句表明，开普勒太空望远镜主要寻找与地球有相似环境的星球。
第三段第二句表明，可让生命存在的星球的直径至少与地球的直径一样大，但不会超过地球直径的两倍。由此可推测出其不会比地球小，因此题干表述错误。
第三段第三、四句表明，适合生命存在的星球必须与它所环绕的恒星有一个合适的距离，以保证星球表面的温度允许液态水存在，而地球正是适合人类居住的星球，而且地球是绕着太阳运行的。
第四段第一句表明，这项新评估源于对超过4.2万颗星球的分析，而非源于对17万颗星球的分析。
第五段第一句表明，研究者承认这项评估是粗糙的，即不精确的。
文章第一段指出，这次的调查结果是新的发现，但通篇文章并未提到这是对可能有生命存在的星球的首次研究。 -
第19题：
共用题干
So Many"Earths"
The Milky Way（银河）contains billions of Earth-sized planets that could support life.That's the finding of a new study.It draws on data that came from NASA's top planet-hunting telescope.
A mechanical failure recently put that Kepler space telescope out of service.Kepler had played a big role in creating a census of planets orbiting some 170,000 stars.Its data have been helping astronomers predict how common planets are in our galaxy.The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study,published in The Proceedings of the National Academy of Sciences,conclude that between 14 and 30 out of every 100 stars,with a mass and temperature similar to the Sun,may host a planet that could support life as we know it.Such a planet would have a diameter at least as large as Earth's,but no more than twice that big.The planet also would have to orbit in a star's habitable zone.That's where the surface temperature would allow any water to exist as a liquid.
The new estimate of how many planets might fit these conditions comes from studying more than 42,000 stars and identifying suitable worlds orbiting them.The scientists used those numbers to extrapolate（推算） to the rest of the stars that the telescope could not see.
The estimate is rough,the authors admit.If applied to the solar system,it would define as habitable a zone starting as close to the Sun as Venus and running to as far away as Mars.Neither planet is Earthlike (although either might have been in the distant past).Using tighter limits,the researchers estimate that between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world.These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesn't sound like a big number.It would mean,however,that the Milky Way could host more than a billion Earth-sized planets with a chance for life.The Earth is a planet orbiting in the Sun's habitable zone.
A:Right
B:Wrong
C:Not mentioned答案：A解析：本篇文章只在第二段第一句表明，近来一次机械故障使开普勒太空望远镜不再为我们服务，并没有提到开普勒太空望远镜为我们服务了多少年。
第二段最后一句表明，开普勒太空望远镜主要寻找与地球有相似环境的星球。
第三段第二句表明，可让生命存在的星球的直径至少与地球的直径一样大，但不会超过地球直径的两倍。由此可推测出其不会比地球小，因此题干表述错误。
第三段第三、四句表明，适合生命存在的星球必须与它所环绕的恒星有一个合适的距离，以保证星球表面的温度允许液态水存在，而地球正是适合人类居住的星球，而且地球是绕着太阳运行的。
第四段第一句表明，这项新评估源于对超过4.2万颗星球的分析，而非源于对17万颗星球的分析。
第五段第一句表明，研究者承认这项评估是粗糙的，即不精确的。
文章第一段指出，这次的调查结果是新的发现，但通篇文章并未提到这是对可能有生命存在的星球的首次研究。 -
第20题：
共用题干
So Many"Earths"
The Milky Way（银河）contains billions of Earth-sized planets that could support life.That's the finding of a new study.It draws on data that came from NASA's top planet-hunting telescope.
A mechanical failure recently put that Kepler space telescope out of service.Kepler had played a big role in creating a census of planets orbiting some 170,000 stars.Its data have been helping astronomers predict how common planets are in our galaxy.The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study,published in The Proceedings of the National Academy of Sciences,conclude that between 14 and 30 out of every 100 stars,with a mass and temperature similar to the Sun,may host a planet that could support life as we know it.Such a planet would have a diameter at least as large as Earth's,but no more than twice that big.The planet also would have to orbit in a star's habitable zone.That's where the surface temperature would allow any water to exist as a liquid.
The new estimate of how many planets might fit these conditions comes from studying more than 42,000 stars and identifying suitable worlds orbiting them.The scientists used those numbers to extrapolate（推算） to the rest of the stars that the telescope could not see.
The estimate is rough,the authors admit.If applied to the solar system,it would define as habitable a zone starting as close to the Sun as Venus and running to as far away as Mars.Neither planet is Earthlike (although either might have been in the distant past).Using tighter limits,the researchers estimate that between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world.These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesn't sound like a big number.It would mean,however,that the Milky Way could host more than a billion Earth-sized planets with a chance for life.The main task of the Kepler space telescope is to find out planets with similar conditions to Earth's.
A:Right
B:Wrong
C:Not mentioned答案：A解析：本篇文章只在第二段第一句表明，近来一次机械故障使开普勒太空望远镜不再为我们服务，并没有提到开普勒太空望远镜为我们服务了多少年。
第二段最后一句表明，开普勒太空望远镜主要寻找与地球有相似环境的星球。
第三段第二句表明，可让生命存在的星球的直径至少与地球的直径一样大，但不会超过地球直径的两倍。由此可推测出其不会比地球小，因此题干表述错误。
第三段第三、四句表明，适合生命存在的星球必须与它所环绕的恒星有一个合适的距离，以保证星球表面的温度允许液态水存在，而地球正是适合人类居住的星球，而且地球是绕着太阳运行的。
第四段第一句表明，这项新评估源于对超过4.2万颗星球的分析，而非源于对17万颗星球的分析。
第五段第一句表明，研究者承认这项评估是粗糙的，即不精确的。
文章第一段指出，这次的调查结果是新的发现，但通篇文章并未提到这是对可能有生命存在的星球的首次研究。 -
第21题：
共用题干
Early Ideas about the Universe
1 Early man got his ideas about the universe by looking at the stars as you do.He
observed carefully,and learned many things about the sun,the moon,and the stars.
2 Suppose you were asked to collect evidence about the sun as early man did.You might
go out morning after morning and see it come up in the east.Even on cloudy mornings,you
would observe that the darkness goes away and the world becomes light.You might not see
the sun but would be sure it is there,because you notice that the earth warms up.As you
continued,the sun climbs higher in the sky each day during part of the year. It stays in the
sky longer. The earth gets warmer. Things begin to grow. It is spring and then summer.
3 After a while the sun stays in the sky for shorter and shorter periods.Many plants begin
to die.Leaves fall.Winter comes.Year after year this is repeated and you cannot tell
exactly why it happens.But you realize that the sun seems to make the difference.
Primitive（原始的）man felt that since the sun was so powerful it must be a god. It may
seem silly to us now to worship（崇拜）a sun-god, but primitive man was right about the
importance of the sun to life on earth.
4 You have been told that the world is round.But suppose no one had ever taught you
that the world was like a huge ball.Would you have ever thought of it yourself?You cannot
see the curve（曲线）of the earth at once. You would have no idea of how big it was.
That's why early man believed that the earth was small and flat.Such ideas appeared from
the evidence they had.
5 If you watch the stars night after night,you will see them rise and set.As you look at
the sky,it is not difficult to imagine that you are in the center of a vast collection of twinkling
（闪烁）lights. Some early astronomers（天文学家）believed the sky was a crystal shell or
series of crystal shells,one inside the other. They believed this because that is what the
night sky looked like.For many centuries,men believed that the earth was the center of
the universe and that the sun,the moon,and the stars circled around it.Early astronomers believed that the sky was a crystal shell or series of crystal shells because_________.
A:he did not observe the sun carefully enough
B:he could not see its curve
C:the sun,the moon and the stars seemed to move around it
D:the earth circles around the sun
E:it looked like that at night
F:it has power over life on earth答案：E解析： -
第22题：
单选题Neap tides occur（）.AAt the start of spring，when the Sun is nearly over the equator
BOnly when the Sun and Moon are on the same sides of the Earth and are nearly in line
CWhen the Sun and Moon are at approximately 90° to each other，as seen from the Earth
DWhen the Sun，Moon，and Earth are nearly in line，regardless of alignment order
正确答案： B解析： 暂无解析 -
第23题：
单选题What is the primary purpose of this passage?ATo alert people to the dangers posed by the sun.
BTo discuss conditions on earth in the far future.
CTo present a theory about red giant stars.
DTo describe changes that the sun will go through.
正确答案： D解析：
主旨题。本文主要谈论了目前作为一个黄色矮星的太阳会逐渐变成红色的巨星，白色的矮星，最终会成为一个黑色矮星。由此得知本文主要目的是谈论太阳所要经历的变化，因此选项D为正确答案。