单选题According to lines 50-58 of Passage 2, microevolution ______.A has never actually been observed, but is believed to be theoretically possibleB is the series of small changes that transforms one species into anotherC lacks evidence, and therefore should

题目
单选题
According to lines 50-58 of Passage 2, microevolution ______.
A

has never actually been observed, but is believed to be theoretically possible

B

is the series of small changes that transforms one species into another

C

lacks evidence, and therefore should not be considered a scientific fact

D

is an evolutionary process involving small changes within a species

E

occurs wherever there are environmental changes in a species' habitat


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  • 第1题:

    单选题
    According to the passage, the Earth’s magnetic field has _____.
    A

    begun to change in the opposite direction

    B

    been weakening in strength for a long time

    C

    caused the changes on the polarities

    D

    misguided many a man and animal


    正确答案: C
    解析:
    文章第一段:《纽约时报》上周报导地球磁场严重减弱开始于150年前。磁场保护着我们的星球,为许多生物指引方向。

  • 第2题:

    单选题
    According to the passage, the Concordia´s captain has been charged with causing the crash and______.
    A

    drug use

    B

    alcohol abuse

    C

    abandoning his post

    D

    setting fire


    正确答案: A
    解析:
    细节理解题。根据第三段最后一句话“The Concordia’s captain is currently on trial for causing a shipwreck and abandoning his ship.”可知:目前,船长正在因为造成船只倾覆以及弃船而受审,本题C选项abandoning his post(放弃岗位,擅离职守),与原文弃船意义一致。

  • 第3题:

    单选题
    The author of Passage 2. most likely thinks that macroevolution ______.
    A

    explains the dysfunctional genes present in hemoglobin

    B

    has been proved to be true by scientific investigations

    C

    is a theory that lacks sufficient evidence

    D

    has never taken place on any scale

    E

    provides insight into our biological cousins


    正确答案: E
    解析:
    作者在最后一段第三句“there is no evidence whatsoever of the evolution of a separate and distinct species”,这说明作者认为还没有足够的证据微进化的存在。

  • 第4题:

    单选题
    The sentence “But this has rarely been a one-way street.” in the last paragraph means that _____.
    A

    contemporary art has been nourished by modern science

    B

    modern science has been nourished by art

    C

    artists can become scientists and scientists can become artists

    D

    the impacts of modern art and science are actually mutual


    正确答案: B
    解析:
    此题考查的是对句意的理解。这句话的意思是“但这几乎从来就不是单行道”。联系上下文可知,这句话是说明科学与艺术之间的影响是相互的,不是单方面的。D项的mutual一词意思是“相互的”,正确表达了句意,故选D。A项和B项的说法不全面。C项意思是艺术家可以成为科学家,科学家也可以成为艺术家,理解错误。

  • 第5题:

    单选题
    According to the author’s observation, college students _____.
    A

    have never been so materialistic as today

    B

    have never been so interested in the arts

    C

    have never been so financially well off as today

    D

    have never attached so much importance to moral sense


    正确答案: D
    解析:
    细节题。第一段,目前的大学新生比过去17年任何时候的学生都更物质主义,而不是剩他主义的。A项与此意属同义重述。

  • 第6题:

    多选题
    Consider each of the choices separately and select all that apply.  Which of the following inferences can be made the information given in the passage?
    A

    Leonard Fuchs probably never actually saw a fuchsia plant.

    B

    Charles Plumier was a student of Fuchs’s at Tubingen.

    C

    Plumier’s book of plants included species from the Caribbean.


    正确答案: A,C
    解析:
    Leonard Fuchs是153-1566的德国医学家,而fuchsia是1703年才出现在欧洲大陆上,所以A项是正确的。由于Hispaniola是加勒比海的一部分,所以C项也是正确的。

  • 第7题:

    单选题
    According to the passage, the Concordia’s captain has been charged with causing the crash and
    A

    drug use

    B

    alcohol abuse

    C

    abandoning his post

    D

    setting fire


    正确答案: B
    解析:

  • 第8题:

    判断题
    Dwarfism is one frequent trend observed in many island species.
    A

    B


    正确答案:
    解析:
    从录音中提到的“One frequent trend observed in such island species, at least when they are large mammals, is dwarfism”,可知许多岛上生物经常会出现侏儒症(dwarfism)这一现象。
    【录音原文】
    Islands are famous for generating indigenous species from whatever biological material pitches up on them. One frequent trend observed in such island species, at least when they are large mammals, is dwarfism. Elephants seem particularly susceptible. The last mammoths, which lived on an island off the coast of Siberia, were, paradoxically, dwarfs. Similar elephantine examples are known from Malta, Sicily and, indeed, Flores itself. And the same thing has been observed in cattle, too.

  • 第9题:

    单选题
    While several baseball teams have tried to supplant the Yankees as the dominant team in baseball, their inability has been unable to win even half as many World Series as the Yankees have won in the past one hundred years.
    A

    their inability has been unable

    B

    the inability they possess has not been able

    C

    having been unable

    D

    they were unable

    E

    they have been unable


    正确答案: B
    解析:
    A和B项改变了句子的意思。C项“having”的使用不恰当,且省去了必要的主语“they”。D项中的一般过去时“were”与后面的现在完成时“have won”的时态不一致。E项中使用“they”作主语,且动词都使用了现在完成时时态。

  • 第10题:

    单选题
    According to the passage, Puritans believed that an unmarried adult woman should be _____.
    A

    financially responsible for herself

    B

    returned to England

    C

    supported by her family

    D

    trained to be a nurse


    正确答案: D
    解析:

  • 第11题:

    单选题
    The passage proceeds by ______.
    A

    presenting a difficulty in one aspect of understanding a theory, suggesting why one solution was dismissed, and then looking at a specific example to support this dismissal

    B

    presenting a difficulty in one aspect of understanding a theory, suggesting why one solution was dismissed, and then offering evidence to support a new theory

    C

    presenting a difficulty in one aspect of understanding a theory, suggesting that another theory is superior, and then showing why this second theory should be accepted

    D

    presenting a difficulty in one aspect of understanding a theory, suggesting a new theory to explain the evidence, and then offering evidence that the dismissal was too hasty

    E

    presenting a difficulty in one aspect of understanding a theory, suggesting why one solution was dismissed, and then offering evidence that the dismissal was too hasty Questions


    正确答案: D
    解析:
    这篇文章提出了一个存在已久的问题,即大规模的进化变异,并解释为什么人们忽视了杂交理论,接着用一项最近的研究例证人们重新考虑杂交理论的原因。

  • 第12题:

    单选题
    You should ()the mooring lines according to the changes of draft.
    A

    adjusted

    B

    adjusting

    C

    adjustment

    D

    adjust


    正确答案: C
    解析: 暂无解析

  • 第13题:

    单选题
    Paleontologists hypothesize that modern birds evolved from the family of dinosaurs that included Tyrannosaurus rex. This hypothesis would be strongly supported if evidence that dinosaurs from this family had a body covering resembling feathers could be found, but so far no such evidence has been found.  Which of the following, if true, would most help the paleontologists explain why no evidence of feathered dinosaurs has yet been found?
    A

    Fossilized dinosaurs have shown many birdlike characteristics, such as bone structure and winglike arms.

    B

    If birds are in fact the descendants of dinosaurs, then it can be argued that the dinosaurs never really died out.

    C

    Flying dinosaurs such as the Pteranodon, which is not thought to have been related to modern birds, do not appear to have had feathers.

    D

    Soft tissues such as skin and feathers do not fossilize like bones, and therefore are far less likely to have left permanent evidence in the fossil record.

    E

    The thousands of dinosaur fossils excavated by paleontologists represent only a tiny fraction of the billions of dinosaurs that once lived.


    正确答案: D
    解析:
    D项为未发掘到恐龙皮肤的原因提供了一个可能的答案,故D项是正确的。E项与问题的关联度不如D项,所以不选E项。

  • 第14题:

    单选题
    According to the passage, the algae ______.
    A

    may not carry on photosynthesis alone

    B

    supply food to the fungi

    C

    can’t live separately

    D

    aren’t recognizable as a species


    正确答案: A
    解析:
    该题细节题。第二段第六句指出“The algae carry on photosynthesis and provide the fungi with food.”(藻类进行光合作用从而为真菌提供食物)。因此选项B为正确答案。

  • 第15题:

    单选题
    As indicated in the passage, being free personal preference in that _____.
    A

    means that one can ignore other people’s criticism

    B

    means that one can impose his preferences on others

    C

    doesn’t mean that one has the right to do things at will

    D

    doesn’t mean that one has the right to charge others without evidence


    正确答案: B
    解析:
    细节推论题。文章末段指出,人人有权发表自己的意见,这不仅是允许的,而且是应当的。但这样做时,前提是只要不伤害别人就行。故C符合。

  • 第16题:

    问答题
    练习14  Research has also been done into the way people’s behavior changes in a number of small, apparently unimportant ways when they lie. It has been found that if they are sitting down at the same time, they tend to move about in their chairs more than usual.

    正确答案: 当人们撒谎时,行为会有一系列小的、看起来不重要的改变,对此人们也进行了研究。研究显示,如果人们在撒谎的同时坐下,他们倾向于比平时更频繁地在椅子上动来动去。
    解析: 暂无解析

  • 第17题:

    单选题
    It is mentioned in the passage that one has to pay tax according to _____.
    A

    how much education one has received

    B

    whether one is single or married

    C

    how old one’s children are

    D

    where one lives


    正确答案: B
    解析:
    事实细节题。题干意为“文章提到,一个人应该根据什么来纳税?”由文章的第一段第一句可知,一个人缴纳税款是由很多因素决定的。“Whether the man is married”是其中的一项,其余选项在原文中均未提及。所以正确答案为B。

  • 第18题:

    单选题
    The evidence of electrical activity and other changes in brain cells after the outside stimulus has been got by observing.
    A

    exposed cat brains

    B

    the human brains

    C

    cat brains and the human brains

    D

    exposed cat brains and the human brains


    正确答案: A
    解析:
    细节题。第八段指出“通过直接观察裸露的猫脑和几例人脑,Grinvald博士和他的同事给一丝光线或一个肢体活动的刺激时能够观察到脑细胞中电流活动和其他变化的最初迹象”。此处提到的“给与一丝光线或一个肢体活动的刺激”对应题干中的outside stimulus(外部刺激),因此选项D为正确答案。

  • 第19题:

    问答题
    Practice 11  (1) Research has also been done into the way people’s behavior changes in a number of small, apparently unimportant ways when they lie. (2) It has been found that if they are sitting down at the same time, they tend to move about in their chairs more than usual. To the trained observer they are saying “I wish I were somewhere else now.”

    正确答案:
    (1) 当人们撒谎时,行为会有一系列小的、看起来不重要的改变,对此人们也进行了研究。
    (2) 研究显示,如果人们在撒谎的同时坐下,他们倾向于比平时更频繁地在椅子上动来动去。
    解析: 暂无解析

  • 第20题:

    单选题
    Which of the following statement is true, according to the above message?
    A

    Singapore has lost 28 percent of its native forest habitat since 1819.

    B

    Singapore has lost nearly 95 percent of its overall biodiversity since 1819.

    C

    All of Singapore’s surviving species are concentrated in one-quarter of the country’s total area.

    D

    Most of Singapore’s surviving species are concentrated in land designated as forest reserves.


    正确答案: A
    解析:
    根据录音最后提到的“…more than half of Singapore’s surviving species are concentrated in…land designated as forest reserves”,可知如今新加坡超过一半(即大多数)现存物种都集中在被指定为森林保护区的地方。故选项D正确。
    【录音原文】
    Examining historical and modern species records from Singapore and neighboring Malaysia, researchers found that Singapore has lost 95% of its native forest habitat and nearly 28% of its overall biodiversity since 1819, when the British established a colony on the island. Today, more than half of Singapore’s surviving species are concentrated in just one-quarter of a percent of the country’s total area, in land designated as forest reserves.

  • 第21题:

    单选题
    Both passages suggest which of the following about evolution?
    A

    The fossil record is incomplete, so we must supplement it with other evidence.

    B

    Our claims about evolutionary processes should be supported with clear evidence.

    C

    Humans are no longer closely related to other species on the planet.

    D

    Macroevolution has been shown to take place millions of times since life began.

    E

    Indisputable evidence for evolution can be found in humans' genetic code.


    正确答案: B
    解析:
    第一篇文章用一些基因来证明进化,而第二篇文章认为进化论这个观点是可疑的,因为缺乏足够的证据。

  • 第22题:

    单选题
    From the passage, we can draw a conclusion that _____.
    A

    family has deep influence on a person

    B

    compliments are very important to a person

    C

    one should treasure the relationship between others

    D

    when facing tough time, one should never say die


    正确答案: A
    解析:
    推理题。根据全文内容可知,本文主要讲述了作者在孩童时期的经历对他以后生活所造成的影响:他成年后不会称赞别人的性格特点都是由于他童年时期的经历造成的饿,童年时期作者是长子,承担起了协助养家糊口的重任,但同时他也只是个孩子,渴望得到母亲的关爱,但是他表露出对弟妹们的支持和鼓励只能让自己更失去母亲的关爱。由此可以推断出A选项的说法正确,其他三项都不是文章的中心和意图所在。因此,本题的正确答案为A。

  • 第23题:

    单选题
    The passage is focused on _____.
    A

    how the scientists tried to protect endangered species

    B

    how the symbolic endangered species has been chosen

    C

    the relation between global warming and endangered species

    D

    the problems in and the future of endangered species protection


    正确答案: A
    解析:
    本文介绍了Siegel选择警示全球变暖危害的象征动物的过程。