单选题The sun heats the earth,（）is very important to living things.A thatB whatC which
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更多“The sun heats the earth,（）is very important to living things”相关问题
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第1题：
The earth ______ round the sun in 365 days .
A moves
B moved
C is moving
D move
参考答案A
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第2题：
The earth ____ around the sun.
A、revolved
B、revolves
C、is revolved
D、was revolved
正确答案:B
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第3题：
B
Scientists are trying to make the deserts into good land again． They want to，bring water to the deserts． But more and more places of the earth is becoming deserts all the time， Scientists may not be able to change the deserts． Scientists think that people make deserts． People are do-ing bad things to the earth．
Some places on the earth don-t get very much rain． But they still don-t become deserts．This is because some green plants are growing there． Small green plants and grass are very helpful to dry places． Plants don't let the wind blow the earth away． When 8 little bit of rain falls，the plants hold the water． Without plants，the land can become a desert much more easily．
( )26． Why can the land become a desert?
A． Because some places don't get very much rain．
B． Because plants don-t let the hot sun make the earth even drier．
C． Because people don't keep the earth well．
D． Because scientists haven-t learnt enough about the deserts．
正确答案：C
26.C【解析】文章第一段提供的信息表明良田变成了沙漠是人为的。故此题选C。 -
第4题：
A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?
A.The motion of the apparent sun is along the ecliptic
B.Measurement of time is along the celestial equator
C.The speed of the Earth's revolution is not constant
D.There are variations in the Earth's rotational speed
正确答案：B
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第5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6题：
共用题干
Weight on and off the Earth We are so used to.our life on the surface of the earth that it can be quite an effort for our mind to break free of all the ideas that we take for granted.Because we can feel that things are heavy,we think of "weight"as being a fixed quality in an object,but it is not really fixed at all.If you could take a one-pound packet of butter 4,000 miles out from the earth,it would weigh only a quarter of a pound. Why would things weigh only a quarter as much as they do at the surface of the earth if we took them 4,000 miles out into space?The reason is this:all objects have a natural attraction for all other objects;this is called gravitational attraction.But this power of attraction between two obects gets weaker as they get farther apart.When the butter was at the surface of the earth,it was 4,000 miles from the center.When we took the butter 4,000 miles out,it was 8,000 miles from the center,which is twice the distance.If you double the distance between two objects,their gravitational attraction decreases two times two.If you treble the distance, it gets nine times weaker(three times three)and so on. So this is one of the first things we need to remember that the weight of an object in space is not the same as its weight on the surface of the earth. What about the weight of our pound of butter on the surface of the moon?At the distance the puii of the earth is about 4,000 times smaller than it is here on the surface,so we can forget all about the earth-pull on our butter. On the other hand,on the moon there will be an attraction between the butter and the moon,but the butter will weigh only about one-sixth as much as it does on the earth.This is because the moon is so much smaller than the earth.The amount of gravitational pull that a body produces depends on the amount of material in it.A packet of butter has a gravitational pull of its own;but this is very small in relation to the pull of something as large as the moon,or the earth,or the sun.We find it hard to break free from ideas connected with living on the earth because______.
A:it demands too great an effort for us to do so
B:we are too familiar with the way things are to question the ideas
C:we have proved that those ideas are correct
D:we are so sure of ourselves that we never doubt anything on the earth答案：B解析：第一段最后一句表明，1磅重的黄油在离地球表面4000英里处重达0.25磅，第二段第一句也表明在4000英里高空处的物体重量仅为其在地球表面的重量的1/4。由此可推算出，4磅重的茶叶在离地球表面4000英里处重达1磅。
第一段第一句表明，我们之所以不能打破固有思维，是因为我们已经习惯了地球上的生活，也就是说，我们正是因为太过熟悉地球上的事物，才没有去质疑这些固有思维。
第一段第二句表明，物体的重量并非固定不变。第二段解释说，物体的重量源于物体间的引力。也就是说，物体的重量随着物体间引力的改变而改变。
最后一段第三句说明一个物体产生的引力与物体本身的重量有关。最后一段第四句又表明由于本身重量较小，一包黄油产生的引力很有限，相对于月球、地球、太阳等产生的强劲引力来说，比较容易被我们忽略。
本篇文章通篇讲的是重量是由引力产生的，并进一步阐述了物体间引力的变化、物体本身的重量，以及物体间的距离这三者之间的关系，主要讲的还是引力对重量的作用。 -
第7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8题：
The sun heats the earth,（）is very important to living things.
- A、that
- B、what
- C、which
正确答案:C -
第9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10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： A解析： 暂无解析 -
第11题：
单选题A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?（）AThe motion of the apparent sun is along the ecliptic
BMeasurement of time is along the celestial equator
CThe speed of the Earth's revolution is not constant
DThere are variations in the Earth's rotational speed
正确答案： C解析： 暂无解析 -
第12题：
单选题We learn from the passage that ______.Aall living things on the earth depend on the sun for their food
Ba forest looks dark in winter because it absorbs solar energy
Conly 0.023 of the energy from the sun is made use of on the earth
Dgreenhouse gases allow heat energy to escape from the earth’ s surface
正确答案： B解析：
根据第一段Sunlight also provides the energy used by green plants to make their own food，阳光给绿色植物提供能量使其生产自己的食物，故选A。 -
第13题：
What Mr. Smith did was important , but ______.A. more important the way of he did things was
B. the way of he did things was more important
C. more important was the way he did things
D. more important the way were he did things
答案：C
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第14题：
Neap tides occur ______.
A.at the start of spring, when the Sun is nearly over the equator
B.only when the Sun and Moon are on the same sides of the Earth and are nearly in line
C.when the Sun and Moon are at approximately 90°to each other, as seen from the Earth
D.when the Sun , Moon, and Earth are nearly in line, regardless of alignment order
正确答案：C
小潮发生在当从地球看太阳和月亮与地球接近90度时。 -
第15题：
Believe it or not，the day when you can go to the moon is coming soon．You can go into space (11) space shuttle．It (12) about three days for the shuttle to go from the earth to the moon． The shuttle flies a long way to a space station． You can stay there for a short rest and then it will (13) you to the moon．
Now you can jump out of the shuttle． But you mustn't take (14) your spacesuit，because it is very hot in the daytime and very cold at night on the moon． The moon is much smaller than the earth． Things are (15) 0n the moon than they are on the earth． You can jump high every time you take a step． You will find that it is never tiring to walk on the moon． You don't need to take an umbrella or a raincoat with you，(16) there is no rain on the moon You can hear (17) because there is no air on the moon． And there are no animals or(18) living things there．
The moon moves more slowly than the earth，so one day on the moon is as long as two weeks on the earth and one night is just as long as two weeks on the earth． What could you do in (19 )long days and nights and in a silent world?' Now scientists are trying to make the (20) 0f the moon． But our earth is really a far better place to live，as long as we take good care of it，
( )11．
A．on
B．in
C．by
D．with
正确答案：C
11.C【解析】构成"by+交通工具”结构，by space shuttle意为“乘航天飞机”。 -
第16题：
Due to the tilt of Neptune's axis,the Sun heats the planet's northern and southemhemispheres unequally.A:climates
B:halves
C:atmospheres
D:contours答案：B解析：本句意思：由于海王星的轴是倾斜的，其南北半球的日射是不均衡的。hemisphere半球。 half半，一半；climate气候；atmosphere大气，气氛；contour外形，轮廓。 -
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.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18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19题：
The sun heats the earth,（）is very important to living things.
Athat
Bwhat
Cwhich
Dwhere
C
略 -
第20题：
VIP是以下哪组词的翻译。（）
- A、Very important place
- B、Very interesting person
- C、Very important person
- D、Very interesting place
正确答案:C -
第21题：
单选题As observed from the Earth，the angle between lines from the Earth to the Sun and the Earth to an inferior planet is known as（）.Aelongation
Bconjunction
Copposition
Dquadrature
正确答案： A解析： 暂无解析 -
第22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23题：
单选题The sun heats the earth,（）is very important to living things.Athat
Bwhat
Cwhich
Dwhere
正确答案： C解析： 暂无解析 -
第24题：
单选题Aphelion is the point where the Sun（）.Aand Moon and Earth form a right angle
Band Moon and Earth are in line
Ccrosses the celestial equator
Dis farthest from the Earth
正确答案： B解析： 暂无解析