更多“单选题Scientists and doctors believed that “Lorenzo’s Oil” _____.A was really effectiveB was a success storyC only worked in theoryD would save the boy’s life”相关问题
  • 第1题:

    共用题干
    第三篇

    “Life Form Found" on Saturn ' s Titan

    Scientists say they have discovered hints of alien life on the Saturn'5 moon.The discovery of a sort of
    life was announced after researchers at the US space agency,NASA,analyzed data from spacecraft Cassini,
    which pointed to the existence of methane-based form of life on Saturn's biggest moon.
    Scientists have reportedly discovered clues showing primitive alien beings are"breathing"in Titan's
    dense atmosphere filled with hydrogen.
    They argue that hydrogen gets absorbed before hitting Titan's planet-like surface covered with methane
    lakes and rivers.This,they say,points to the existence of some"bugs"consuming the hydrogen at the surface
    of the moon less than half the size of the Earth.
    "We suggested hydrogen consumption because it's the obvious gas for life to consume on Titan,similar
    to the way we consume oxygen on Earth,"says NASA scientist Chris McKay."If these signs do turn out to be
    a sign of life,it would be doubly exciting because it would represent a second form of life independent from
    water-based life on Earth."
    To date,scientists have not yet detected this form of life anywhere,though there are liquid-water-based
    microorganisms on Earth that grow well on methane or produce it as a waste product. On Titan,where
    temperatures are around minus 17 Kelvin(minus 290 degrees Farenheit),a methane-based organism would
    have to use a substance that is liquid as its medium for living processes,but not water itself. Water is frozen
    solid on Titan'5 surface and much too cold to support life as we know it.
    Scientists had expected the Sun'5 interactions with chemicals in the atmosphere to produce a coating of
    acetylene on Titan'5 surface.But Cassini detected no acetylene on the surface.
    The absence of detectable acetylene on the Titan's surface can very well have a non-biological explana-
    tion,said Mark Allen,a principal investigator of the NASA Titan team.
    "Scientific conservatism suggests that a biological explanation should be the last choice after all non-
    biological explanations are addressed,"Allen said."We have a lot of work to do to rule out possible non-bio-
    logical explanations.It is more likely that a chemical process,without biology,can explain these results."

    What do scientists claim to have found about Saturn?
    A: Water-based life on it.
    B: Methane-based life on its biggest moon.
    C:A new moon moving around it.
    D:Earthlike life on its biggest moon.

    答案:B
    解析:
    由文章第一段第二句话中“The discovery of...which pointed to the existence of methane- based form of life on Saturn' s biggest moon.”可知,科学家们的证据显示,土星的这个最大的卫 星上有甲烷基的生命形态存在,故选B。
    由文章第二、三段的内容可知,科学家们发现有线索显示“土卫六”上原始的外星生物 在由氢气环绕的稠密大气层中“呼吸”,也就是说这个卫星上有氢气的消耗现象。故选D。
    由文章前五段的内容可知,科学家在文章开头提出“土卫六”上可能有甲烷基的生命形 态,即methane-based life,接下来的内容给出了科学家们对此说法的一系列证据来进行论证,故 选C。
    由文章的最后两段中Mark Allen的话,尤其是文章最后一句“It is more likely that a chemical process ,without biology , can explain these results.”可知,科学家们认为应该用化学过程 来解释为什么“土卫六”表面没有乙炔,故选B。
    由文章内容可知,科学家们提出了土星的这个最大的行星上可能有一种不依赖于水的 生命形态,并从各方面进行了证明,故选A。第5部分:补全短文

  • 第2题:

    共用题干
    Europa's Watery Underworld

    Europa,one of Jupiter's 63 known moons,looks bright and icy on the surface.But appearances can be
    deceiving:Miles within its cracked,frigid shell,Europa probably hides giant pools of liquid water. Where
    scientists find liquid water,they hope to find life as well.
    Since we can't go diving into Europa's depths just yet,scientists instead have to investigate the moon's
    surface for clues to what lies beneath.In a new study,scientists investigated one group of strange ice patterns
    on Europa and concluded that the formations mark the top of an underground pool that holds as much water
    as the U.S.Great Lakes.
    Pictures of Europa,which is slightly smaller than Earth's moon,clearly show a tangled,icy mishmash
    of lines and cracks known as"chaos terrains".These chaotic places cover more than half of Europa. For
    more than 10 years,scientists have wondered what causes the formations.The new study suggests that they
    arise from the mixing of vast underground stores of liquid water with icy material near the surface.
    For scientists who suspect that Europa also may be hiding life beneath its icy surface,the news about
    the new lake is exciting.
    "It would be great if these lakes harbored life,"Britney Schmidt,a planetary scientist who worked on
    the study,told Science News."But even if they didn't,they say that Europa is doing something interesting
    and active right now."
    Schmidt,a scientist at the University of Texas at Austin,and her colleagues wanted to know how chaos
    terrains form.Since they couldn't rocket to Europa to see for themselves,they searched for similar forma-
    tions here on Earth.They studied collapsed ice shelves in Antarctica and icy caps on volcanoes in Iceland.
    Those features on Earth formed when liquid water mixed with ice.The scientists now suspect something
    similar might be happening on Europa:that as water and ice of different temperatures mingle and shift,the
    surface fractures.This would explain the jumbled ice sculptures.
    "Fracturing catastrophically disrupts the ice in the same way that it causes ice shelves to collapse on
    Earth,"Schmidt told Science News.She and her team found that the process could be causing chaos terrains
    to form quickly on Europa.
    The new study suggests that on this moon,elements such as oxygen from the surface blend with the
    deep bodies of water. That mixture may create an environment that supports life.

    The liquid water of an underground pool of Europa is estimated as much as the volume of the U.S.Great Lakes.
    A:Right
    B:Wrong
    C:Not mentioned

    答案:A
    解析:
    由文章第二段第二句“In a new study...the formations mark the top of an underground pool that holds as much water as the U.S.Great Lakes.”可知,科学家通过研究一组奇异的冰的图案 得出结论:这种结构是一个地下水库的顶部,这个水库的蓄水量相当于美国五大湖的蓄水量, 故选A。
    由文章第三段最后一句话“The new study suggests that they arise from the mixing of vasi underground stores of liquid water with icy material near the surface.”可知,欧罗巴(Europa)上的 奇异冰图案是由大量的含有冰状物质的地下水经混合而成的,故选B。
    由文章第一段的内容可知,欧罗巴是已知的木星63个卫星中的一个,但并未提及其被 发现的早晚,故选C。
    由文章第三段的第乙句话中“Europa , which is slightly smaller than Earth ' s moon”可知, 欧罗巴比地球的卫星―月亮稍微小些,故选B。
    由第六段的第二句话中“Since they couldn ' t rocket to Europa”可知,科学家目前还不能 去欧罗巴星球,故选B。
    由文章第六段的内容可知,Schmidt及其同事在地球上寻找相似的结构进行研究。他 们研究了南极的冰架,认为他们得出的结论也可以解释欧罗巴上的冰形图案,故选B。
    由文章第一段最后一句话的内容可知,科学家们认为有水的地方就很有可能存在生 命;最后一段也提到,欧罗巴星球表面的氧元素和地下水的化合,给生命的出现提供了环境,因 此水的存在是生命出现的必要条件。故选A。

  • 第3题:

    共用题干
    Europa's Watery Underworld

    Europa,one of Jupiter's 63 known moons,looks bright and icy on the surface.But appearances can be
    deceiving:Miles within its cracked,frigid shell,Europa probably hides giant pools of liquid water. Where
    scientists find liquid water,they hope to find life as well.
    Since we can't go diving into Europa's depths just yet,scientists instead have to investigate the moon's
    surface for clues to what lies beneath.In a new study,scientists investigated one group of strange ice patterns
    on Europa and concluded that the formations mark the top of an underground pool that holds as much water
    as the U.S.Great Lakes.
    Pictures of Europa,which is slightly smaller than Earth's moon,clearly show a tangled,icy mishmash
    of lines and cracks known as"chaos terrains".These chaotic places cover more than half of Europa. For
    more than 10 years,scientists have wondered what causes the formations.The new study suggests that they
    arise from the mixing of vast underground stores of liquid water with icy material near the surface.
    For scientists who suspect that Europa also may be hiding life beneath its icy surface,the news about
    the new lake is exciting.
    "It would be great if these lakes harbored life,"Britney Schmidt,a planetary scientist who worked on
    the study,told Science News."But even if they didn't,they say that Europa is doing something interesting
    and active right now."
    Schmidt,a scientist at the University of Texas at Austin,and her colleagues wanted to know how chaos
    terrains form.Since they couldn't rocket to Europa to see for themselves,they searched for similar forma-
    tions here on Earth.They studied collapsed ice shelves in Antarctica and icy caps on volcanoes in Iceland.
    Those features on Earth formed when liquid water mixed with ice.The scientists now suspect something
    similar might be happening on Europa:that as water and ice of different temperatures mingle and shift,the
    surface fractures.This would explain the jumbled ice sculptures.
    "Fracturing catastrophically disrupts the ice in the same way that it causes ice shelves to collapse on
    Earth,"Schmidt told Science News.She and her team found that the process could be causing chaos terrains
    to form quickly on Europa.
    The new study suggests that on this moon,elements such as oxygen from the surface blend with the
    deep bodies of water. That mixture may create an environment that supports life.

    The existence of liquid water is a necessity for a life-support environment.
    A:Right
    B:Wrong
    C:Not mentioned

    答案:A
    解析:
    由文章第二段第二句“In a new study...the formations mark the top of an underground pool that holds as much water as the U.S.Great Lakes.”可知,科学家通过研究一组奇异的冰的图案 得出结论:这种结构是一个地下水库的顶部,这个水库的蓄水量相当于美国五大湖的蓄水量, 故选A。
    由文章第三段最后一句话“The new study suggests that they arise from the mixing of vasi underground stores of liquid water with icy material near the surface.”可知,欧罗巴(Europa)上的 奇异冰图案是由大量的含有冰状物质的地下水经混合而成的,故选B。
    由文章第一段的内容可知,欧罗巴是已知的木星63个卫星中的一个,但并未提及其被 发现的早晚,故选C。
    由文章第三段的第乙句话中“Europa , which is slightly smaller than Earth ' s moon”可知, 欧罗巴比地球的卫星―月亮稍微小些,故选B。
    由第六段的第二句话中“Since they couldn ' t rocket to Europa”可知,科学家目前还不能 去欧罗巴星球,故选B。
    由文章第六段的内容可知,Schmidt及其同事在地球上寻找相似的结构进行研究。他 们研究了南极的冰架,认为他们得出的结论也可以解释欧罗巴上的冰形图案,故选B。
    由文章第一段最后一句话的内容可知,科学家们认为有水的地方就很有可能存在生 命;最后一段也提到,欧罗巴星球表面的氧元素和地下水的化合,给生命的出现提供了环境,因 此水的存在是生命出现的必要条件。故选A。

  • 第4题:

    Einstein's Theory of Relativity was so profound that only a few scientists could understand it.

    A:deep
    B:superior
    C:wide
    D:narrow

    答案:A
    解析:
    本句意思:爱因斯坦的相对论是如此的深奥,以至于只有少数科学家能够理解。 profound意为“深刻的,深奥的”,与deep(深远的,深奥的)意思相近。superior较高的,较好的; wide宽的;narrow窄的。

  • 第5题:

    共用题干
    第一篇

    There are many ways of defining success.It is accurate to say that each of us has our own concept of success to the extent that each of us is responsible for setting our own goals and determining whether we have met these goals satisfactorily.Because each of us possesses unique differences in genetic ability and favorable environments in which to express these abilities,it is necessarily true that we must define success broadly.
    For some people,simply being able to live their life with a minimum of misery and suffering is considered a success.Think of the peace of mind of the poor shepherd who tends his sheep,enjoys his frugal life with his family in the beauty of nature,and who is respected because he does a good job of achieving the goals expected of and accepted by him and his society.On the other hand,it seems that even though some people appear to be rich in material possessions,many of them seem to be miserable and consider themselves unsuccessful when judged by their own standards of success. Because not all ventures can be successful,one should not set unrealistic goals for achieving suecess,but if one has self-confidence it would be unfortunate to set one's goals at too low a level of achievement.
    A wise counselor once said to a young man who was experiencing frustration with his own professional success:"You do not have to set your goal to reach the moon in order to have success in traveling. Sometimes one can be very successful merely by taking a walk in the park or riding the subway downtown."The counselor added,"You have not really failed and spoiled your chances for success until you have been unsuccessful at something you really like,and to which you have given your best effort."

    The last paragraph implies that__________.
    A:we should have high goals
    B:success means achieving great goals
    C:success means taking a walk in the park
    D:success means trying one's best at what one really likes

    答案:D
    解析:
    推断题。根据第一段最后一句:Because each of us possesses unique differences in genetic ability and favorable environments in which to express these abilities,it is necessarily true that we must define success broadly.由于每个人天赋有所不同,而且所拥有的可以使这种天赋得以实现的有利环境也因人而异,确实应该对成功做一个广义的定义。该句话暗示取得成功的主要因素就是能力和环境。因此正确答案选C。
    词义推断题。thrifty“节约的”; wealthy“富有的”; wasteful“浪费的”; miserable“可怜的,悲惨的”。根据该句中…poor shepherd...enjoy his frugal life…以及后一句话中的 On the other hand ,...appear to be rich....seem to be miserable…通过对照来说明财富并不是评判成功的标准。贫穷的牧羊人虽然生活节俭但很享受,而有钱人却过着自认为悲惨的生活。
    细节题。根据第二段第三句:...some people appear to be rich in material possessions,…consider themselves unsuccessful when judged by their own standards of success.有的人似乎物质上很富裕,可是按照他们自己对于成功的判断标准来看,他们却并不认为自己成功。由此可知,有些富人之所以觉得自己不成功就是因为他们按照自己对于成功的标准来判断。因此正确答案选D。
    推断题。最后一段最后一句:The counselor added,"You have not really failed and spoiled your chances for success until you have been unsuccessful at something you really like , and to which you have given your best effort.”这位咨询人员补充道:除非你已经尽力而为但没有做成自己特别喜欢的事情,否则你并没有失败,也没有减少成功的概率。由此可以推断:只有已经尽力而为但没有做成自己喜欢的事情才是失败,只要是尽力做好自己喜欢的事情就是成功。因此正确答案选D。
    主旨题。根据第一段第一句:There are many ways of defining success.和最后一句:...it is necessarily true that we must define success broadly.可知本文主要内容即成功的定义。第二段主要通过举例子的方式来说明成功的定义可以很宽泛。最后一段则是通过一位咨询人士之口来暗示出:只要尽最大的努力去做自己喜欢的事情就是成功。因此正确答案选A。

  • 第6题:

    单选题
    The only thing()really matters to the children is how soon they can return to their aunt and uncle’s farm.
    A

    that

    B

    what

    C

    which

    D

    this


    正确答案: B
    解析: 暂无解析

  • 第7题:

    单选题
    The only thing what really matters to the children is how soon they can return to their uncle's farm.
    A

    what

    B

    to

    C

    is

    D

    how soon


    正确答案: A
    解析:

  • 第8题:

    单选题
    During which phase of the Steps to Success methodology for Cisco SMB Security Solutions would the Security Technology Requirements document be used to determine a customer’s security requirements?()
    A

    Perform

    B

    Position

    C

    Develop

    D

    Prepare

    E

    Plan

    F

    Design


    正确答案: E
    解析: 暂无解析

  • 第9题:

    单选题
    The families of other ALD patients thought that _____.
    A

    the research for the new cure would cost too much money

    B

    the efforts of Lorenzo’s parents were a waste of time

    C

    Lorenzo’s parents would succeed in finding a cure

    D

    Lorenzo’s oil was a real cure for ALD


    正确答案: D
    解析:
    细节题。由文中第二段第二句话“医生和其他病人的家人们都不以为然,他们经常不会认真看待这件事”“他们认为这些努力就是在浪费时间”可知,医生和别的患者父母认为Lorenzo父母的行为是“浪费时间”,B项直接引用,为正确选项。A项“花费太高”在文中没有提及。C、D项语意矛盾。

  • 第10题:

    单选题
    As a matter of fact, Saudi Arabia’s oil reserves are only second with those of Kuwait.
    A

    come second falling  

    B

    come second with    

    C

    are only second to

    D

    are second only to


    正确答案: C
    解析: 句意:事实上,沙特阿拉伯的石油储量仅次于科威特。选项[A]和[B]均为不完整表达,当弃之。选项[C]和[D]考查能否妥善处理only在句中的位置。only修饰主语时,一般放在主语前面。only修饰句子的另一部分时,经常放在中间位置(动词之前)。为了更精确地表达意思,可以把only放在所修饰的宾语、补语、或状语词组的前面。本题要表达的是“仅次于……”,而不是“仅仅是第二”。用only修饰to Kuwait才可精确表达出“仅次于科威特”之意。实际上该用法(be second only to…)已成习惯用法。

  • 第11题:

    单选题
    Lorenzo’s father organized an international study to _____.
    A

    test Lorenzo’s Oil

    B

    get financial support

    C

    find a cure for the disease

    D

    introduce the cure worldwide


    正确答案: A
    解析:
    细节题。由关键词“国际性的研究学习”定位到短文最后一段第一句“Finally, the boy’s father organized an international study to test the oil”,最后,孩子的父亲组织了一个国际性的研究学习来测验这种油。A项直接引用,为正确选项。B项“获得经济支持”文中没有提及。C项语意矛盾。D项在文中没有提及。

  • 第12题:

    单选题
    Stan: Thank you from the bottom of my heart for saving my little girl’s life.  John: ________.  Stan: I can’t tell you how much I appreciate what you’ve done.  John: I’m just happy I could help.
    A

    There’s nothing to be afraid of.

    B

    This is a wonderful day.

    C

    Anybody would have done the same.

    D

    I am glad to save her.


    正确答案: D
    解析:
    这是一道与文化有关的题,当你救了别人的命,别人对你表示感谢时,你应该用“任何人都会这样做”来谦虚地回答。A选项“没什么可怕的”不符合题意,B选项“今天很美好”不合题意,D选项“很高兴救了她的命”与John最后一句的回答重复。因此C项正确。

  • 第13题:

    共用题干
    第三篇

    “Life Form Found" on Saturn ' s Titan

    Scientists say they have discovered hints of alien life on the Saturn'5 moon.The discovery of a sort of
    life was announced after researchers at the US space agency,NASA,analyzed data from spacecraft Cassini,
    which pointed to the existence of methane-based form of life on Saturn's biggest moon.
    Scientists have reportedly discovered clues showing primitive alien beings are"breathing"in Titan's
    dense atmosphere filled with hydrogen.
    They argue that hydrogen gets absorbed before hitting Titan's planet-like surface covered with methane
    lakes and rivers.This,they say,points to the existence of some"bugs"consuming the hydrogen at the surface
    of the moon less than half the size of the Earth.
    "We suggested hydrogen consumption because it's the obvious gas for life to consume on Titan,similar
    to the way we consume oxygen on Earth,"says NASA scientist Chris McKay."If these signs do turn out to be
    a sign of life,it would be doubly exciting because it would represent a second form of life independent from
    water-based life on Earth."
    To date,scientists have not yet detected this form of life anywhere,though there are liquid-water-based
    microorganisms on Earth that grow well on methane or produce it as a waste product. On Titan,where
    temperatures are around minus 17 Kelvin(minus 290 degrees Farenheit),a methane-based organism would
    have to use a substance that is liquid as its medium for living processes,but not water itself. Water is frozen
    solid on Titan'5 surface and much too cold to support life as we know it.
    Scientists had expected the Sun'5 interactions with chemicals in the atmosphere to produce a coating of
    acetylene on Titan'5 surface.But Cassini detected no acetylene on the surface.
    The absence of detectable acetylene on the Titan's surface can very well have a non-biological explana-
    tion,said Mark Allen,a principal investigator of the NASA Titan team.
    "Scientific conservatism suggests that a biological explanation should be the last choice after all non-
    biological explanations are addressed,"Allen said."We have a lot of work to do to rule out possible non-bio-
    logical explanations.It is more likely that a chemical process,without biology,can explain these results."

    It can be inferred from Mark Allen's address that_____________.
    A:scientists are trying to confirm these is life on Titan
    B:scientists agree that a chemical process is a convincing explanation
    C:scientists share the opinion that a biological explanation is reasonable
    D:scientists are arguing over whether there is life on Titan

    答案:B
    解析:
    由文章第一段第二句话中“The discovery of...which pointed to the existence of methane- based form of life on Saturn' s biggest moon.”可知,科学家们的证据显示,土星的这个最大的卫 星上有甲烷基的生命形态存在,故选B。
    由文章第二、三段的内容可知,科学家们发现有线索显示“土卫六”上原始的外星生物 在由氢气环绕的稠密大气层中“呼吸”,也就是说这个卫星上有氢气的消耗现象。故选D。
    由文章前五段的内容可知,科学家在文章开头提出“土卫六”上可能有甲烷基的生命形 态,即methane-based life,接下来的内容给出了科学家们对此说法的一系列证据来进行论证,故 选C。
    由文章的最后两段中Mark Allen的话,尤其是文章最后一句“It is more likely that a chemical process ,without biology , can explain these results.”可知,科学家们认为应该用化学过程 来解释为什么“土卫六”表面没有乙炔,故选B。
    由文章内容可知,科学家们提出了土星的这个最大的行星上可能有一种不依赖于水的 生命形态,并从各方面进行了证明,故选A。第5部分:补全短文

  • 第14题:

    Professor Taylor's talk has indicated that science has a very strong influence on the everyday life of non-scientists as well as scientists.

    A: motivation
    B: perspective
    C: impression
    D: impact

    答案:D
    解析:
    句意:泰勒教授在讲话中指出科学对科学家和普通人的日常生活都影响巨大。motivation意为“动机”;perspective意为“想法、观点”;impression意为“印象”;impact意为“影响”,常用结构是have an impact on...。

  • 第15题:

    The doctors tried their best to save the patient's life,__failed.

    A.or
    B.so
    C.but
    D.because

    答案:C
    解析:
    此题考查连词的使用。根据句意,上下文是转折关系,所以选C。医生们尽力挽救,但还是失败了。

  • 第16题:

    Einstein's Theory of Relativity was so pofound that only a few scientists could understand it.

    A:deep
    B:superior
    C:wide
    D:narrow

    答案:A
    解析:
    本句意思:爱因斯坦的相对论是如此的深奥,以至于只有少数科学家能够理解它。profound意为“深刻的,深奥的”,与deep(难懂的,深奥的)意思相近。superior较高的,较好的;wide宽的;narrow窄的。

  • 第17题:

    问答题
    Directions: In this section, there is one passage followed by 5 questions. Read the passage carefully, then answer the questions in as few words as possible (not more than 10 words). Remember to write the answers on the Answer Sheet.  Questions 1-5 are based on the following passage.  If you were on a distant planet, and if you had instruments that could tell you the composition of Earth’s atmosphere, how would you know there was life on this planet?Water in the atmosphere would suggest there could be water on the surface, and as we all know water is considered crucial to life. But water would only suggest that life is possible. It wouldn’t prove it’s there.  Carbon? That basic component of “life as we know it?” Not necessarily. A diamond is pure carbon, and it may be pretty, but it isn’t alive.  What really sets Earth apart is nitrogen, which makes up 80 percent of the planet’s atmosphere. And it’s there only because there is abundant life on Earth, say scientists at the University of Southern California  The report grew out of a class discussion two years ago in a course taught by Capone and Kenneth Nealson, professor of earth sciences. Students were asked to come up with different ideas about searching for life on other planets. What is a distinct “signature,” as Capone puts it, that would show there is life on another planet?  That’s a question that has been kicked around in many quarters in recent decades, especially since all efforts to find some form of life, no matter whether on Mars or in the distant reaches of space, have failed. At least so far.  The current effort to search for some evidence of life on Mars focuses primarily on the search for water, because it has long been believed that water, or at least some fluid, is necessary for the chemical processes that lead life to take place. But that’s probably the wrong approach, the USC group argues.  “It’s hard to imagine life without water, but it’s easy to imagine water without life,” says Nealson, who was on the Mars team before moving to USC.  But nitrogen would be a much clearer signature of life. Only about 2 percent to 3 percent of the Martian atmosphere is nitrogen. That’s just a trace, and it probably means there is no life on Mars today, and if there was in the past, it probably ended many, many years ago.  But, the USC team adds quickly, that doesn’t mean there’s no life anywhere else in the universe. They don’t know where, of course, but they may have found a way to narrow down the search. Look first for nitrogen, then look for biological activity that should be there.  So if life exists elsewhere, and is similar to life as we know it, there should be nitrogen, and that’s what we should be looking for first, the researchers say.  If they don’t find nitrogen on Mars, Capone says, “that will probably bring us to the conclusion that there likely never was life on Mars.”  But how about elsewhere? Could this technique be used to search for life in other solar systems?  Maybe. It might be possible to detect a nitrogen-rich atmosphere around a planet orbiting another star, but not yet. Current instruments aren’t that sensitive.  If they ever are, the search for life might be narrowed down to the most promising prospects, chiefly because of the presence of nitrogen. And won’t that be fun!  Questions:  1.What can suggest life is possible but cannot be proved according to the author?  2.What is a clear “signature” of life on another planet according to Capone?  3.What is considered as a wrong way to search for evidence of life on Mars?  4.What can probably prove there is no life on Mars today based on the new theory?  5.Why is it impossible to use the new technique to search for life in other solar systems now?

    正确答案:
    1.Water. 根据文中第二段,水只能表明生命存在的可能性,但不能证实。
    2.Nitrogen. / The presence of nitrogen. 文中第九段第一句话很明确地告诉我们nitrogen would be a much clearer signature of life。
    3.The search for water. 第七段最后一句话指出,在火星上通过搜索水来搜索生命的存在是不正确的。
    4.The small amount (2% to 3%) of nitrogen in the Martian atmosphere . 文中第九段中提到火星上氮的含量很少可以表明目前火星上没有生命的存在。
    5.Because current instruments aren’t very sensitive. 文中第十四段指出,由于现在的设备还不是那么敏感,所以不能够用来在太阳系的其他星球上探测生命。
    解析: 暂无解析

  • 第18题:

    填空题
    It’s believed by the astrologers that the houses determine how the planets and the signs influence a person’s daily life.____

    正确答案: D
    解析:
    由题干中“the houses”定位至D段。本段讲到,占星家们相信,这些宫决定了行星和星座如何影响一个人的日常生活。故匹配段落为D段。

  • 第19题:

    单选题
    From the passage, one can assume that which of the following statements would best describe Hemingway’s attitude toward knowledge?
    A

    One can learn about life only by living it fully.

    B

    A wise person will read widely in order to learn about life.

    C

    Knowledge is a powerful tool that should be reserved only for those who know how to use it.

    D

    Experience is a poor teacher.


    正确答案: A
    解析:
    全文主旨是想说明海明威非常尊崇事实,以实际经验为基础写作,因此他对知识的态度应是知识来自于生活,只有自己生活过才能了解。

  • 第20题:

    单选题
    His _____ by the kind old man changed the boy’s whole life.
    A

    foundation

    B

    fulfillment

    C

    adaptation

    D

    adoption


    正确答案: B
    解析:
    adoption收养。foundation建立,基础。fulfillment履行,实现。adaptation适应,改编。

  • 第21题:

    单选题
    Franklin's ability to learn from observations and experience()greatly to his success in public life.
    A

    contributed

    B

    owed

    C

    attached

    D

    related


    正确答案: A
    解析: 暂无解析

  • 第22题:

    单选题
    Without the sun’s light ______ the earth’s surface, it would be so cold that life could not exist on the earth.
    A

    warms

    B

    warmed

    C

    warming

    D

    to warm


    正确答案: D
    解析:
    句意:没有阳光温暖地球表面,地球就会非常寒冷,生物就无法在地球上生存。Without加独立主格,分词的主语the sun’s light和warm之间应该是主动关系,用现在分词,故为C。

  • 第23题:

    问答题
    Today, thanks to advances in brain research, we know that reading with a child has intellectual, emotional and physical benefits that can enhance the child’s development. The intimacy of sharing books and stories strengthens the emotional bonds between a parent and child, helps a child learn words and concepts, and actually stimulates the growth of a baby’s brain. Scientists have discovered that children whose parents read and talk to them during the first three years of life create a stronger foundation for future reading success.

    正确答案:
    如今,在大脑研究方面所取得的进展,使我们知道和孩子一起阅读对他的智力、情感和身体都有益处,可以促进他的成长。与孩子亲昵地分享图书和故事会增强父母与孩子之间的亲情,帮助孩子学习词汇和概念,并能激发孩子大脑的发育。科学家发现,三岁前给孩子念故事,和孩子交谈,这会为他们将来的阅读能力奠定较为坚实的基础。
    解析: 暂无解析