Question

【题目】阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

Scientists recently found three animal species living two miles below the surface of the Mediterranean Sea, where the super-salty waters don’t have oxygen(氧). They’re multicellular(多细胞的), which means their bodies have many cells. They each are as small as a large grain of sand. But they are animals.

The most exciting thing about these creatures, say the scientists, is that they obviously don’t need oxygen to live. What biologists know about life so far is that only single-celled living things can live in places that have no oxygen, and that multicellular organisms(有机物) can visit these places, but not live there. These newly found creatures could change that idea.

Finding animals down there was so surprising that the scientists couldn’t believe it. At first, “we thought they were dead bodies,” Roberto Danovaro, a scientist at the Polytechnic University of Marche in Ancona, Italy, told Science News. To find out whether the animals could actually live there Danovaro and his colleagues brought up more samples(样本) from the ocean floor. Studying the animals in the new samples showed that they appeared to be alive.

The researchers did more tests, and found that some of the animals had eggs—which suggests they were reproducing(繁殖). Also in the samples were old skins, suggesting that the animals had lived there long enough to grow. Finally, pictures taken showed that the insides of the animals appear to be adapted to live in an environment that has no oxygen.

These clues suggest the animals don’t need oxygen, but the evidence(证据) is indirect, which means that scientists still have not observed how the animals live without oxygen. This means more studies are needed, but the scientists think they’re on the right track. And if they’re right, biologists will need to rethink what they know about where animals live.

【1】What excited the scientists most is that ______.

A.they found three animal species visit the salty water under the Mediterranean Sea

B.single-celled animals can live in super-salty waters

C.the tiny animals have many cells

D.three kinds of animals can live in places that have no oxygen

【2】The underlined phrase in Paragraph 2 means the scientists could think _____.

A.only single-celled creatures don’t need oxygen to live

B.multicellular animals can visit the super-salty waters

C.the newly found creatures can’t live in the super-salty waters

D.multicellular animals also can live without oxygen besides single-celled ones

【3】Which of the following CAN’T be used to prove the newly found creatures can live in super-salty waters?

A.Their dead bodies are found there.

B.Some in the samples have eggs.

C.Some old skins are found in the samples.

D.The pictures of their insides have been taken.

【4】More studies are needed to prove_____.

A.where single-celled animals can live

B.how the newly found animals live without oxygen

C.whether the multicellular creatures can live underwater

D.why the super-salty waters have no oxygen

Answer 1

【答案】

【1】D

【2】D

【3】A

【4】B

【解析】

试题分析：文章介绍了科学家在深海没有氧气的水中发现了三种多细胞的动物，并对他们是否能真正的在如此的环境中生存进行了研究。

【1】D 细节理解题。根据第一段和第二段可知，科学家在深海中发现了三种生物，最让他们兴奋的是这三种多细胞动物竟然是生活在没有氧气的水中。

【2】D 句意理解题。第二段中说到科学家们认为只有单细胞的动物才可以在没有氧气的水中生存，多细胞动物只能到达这样的环境却不能在这样的环境中生存。所以这样的发现可能改变科学家们原来的观点。

【3】A 细节理解题。根据倒数第二段中的内容可知：在所取得的样本中发现了有的动物有卵；也发现了他们退去的陈旧的皮肤；他们体内的照片也发现他们适应了没有氧气的环境。所有这些都间接地证明了这些动物是不需要氧气的。

【4】B 细节理解题。根据最后一段的第一句指出目前的证据都是间接的，要想证明这些动物是如何在没有氧气的情况下生存还需要进一步的试验。