根据短文内容.从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项.The sea has always interested man. From it he can get food, minerals and treasure. 1. But he couldn’t go far beneath its surface. ??? 2. However, he isn’ 题目和参考答案——青夏教育精英家教网—

题目内容

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

The sea has always interested man. From it he can get food, minerals and treasure. 1. But he couldn’t go far beneath its surface.

??? 2. However, he isn’t a fish. Because he must breathe air, he can’t stay under the water’s surface for any length of time. To explore deep water, man faces even more dangers and problems.

??? A diver who wants to stay under water for more than a few minutes must breathe air or a special mixture of gases. 3. He can carry a tank of air on his back and breathe through a hose and a mouthpiece. Water weighs 800 times as much as air. Tons of water pushes against a diver deep in the sea. 4. .

??? When a diver is under great pressure, his blood takes in some of the gases he breathes. As he rises to the surface, the water pressure becomes less. If the diver rises too quickly, the gases in his blood form bubbles. The diver is then suffering from the bends（潜水员病）. The bends can cause a diver to double up in pain. 5. ?

A. His body is under great pressure.

B. Scientists are trying to find more about the sea.

C. For thousands years, he could sail on it

D. They can even kill him．

E. He can wear a diving suit and have air pumped to him from above.

F. The water pressure can cause a diver to breathe with difficulty.

G. Man wants to explore deep into the sea.

【答案】

1.C

2.G

3.E

4.A

5.D

【解析】

试题分析：本文介绍了在几千年以前，人类就可以在海上航行，但是却无法潜入海下很远，人类很想探索深海，但人类不是鱼，潜入深海面临很多危险和困难。在深海中，大量的水挤在潜水员身上，他的身体承受巨大的压力，上岸后，可能会得潜水员病，潜水员病甚至会致命

1.根据But he couldn’t go far beneath its surface. 可知这里想说在几千年以前，人类就可以在海上航行，但是却无法潜入海下很远，故选C。

2.根据However, he isn’t a fish. Because he must breathe air, he can’t stay under the water’s surface for any length of time. To explore deep water, man faces even more dangers and problems. 可知这里想说人类想要探索深海，故选G。

3.根据He can carry a tank of air on his back and breathe through a hose and a mouthpiece.可知这里想说他可以穿潜水服，从上面向下输送氧气，故选E。

4.根据Tons of water pushes against a diver deep in the sea.可知这里想说在深海中，大量的水挤在潜水员身上，他的身体承受巨大的压力，故选A。

5.根据The diver is then suffering from the bends（潜水员病）. The bends can cause a diver to double up in pain. 可知这里想说潜水员病甚至会致命，故选D

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