Question

英语题，帮忙回答下，谢谢

第31题
The sea has always interested man. From it he can get food, minerals, and treasure. For thousands of years, he could sail on it. But he could not go far beneath its surface.
Man wants to explore deep into the sea. However, he is not a fish. Because he must breathe air, he can not 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. He can wear a diving suit and have air pumped to him from above. He can carry a tank of air on its 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. His body is under great pressure.
When a diver is under great pressure, his blood takes in some of gases he breathes. As he rises to 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. They can even kill him.
1．阅读理解

On the whole, this passage is about _______ .

A、special mixture of gases in deep sea

B、the problems man faces in deep-sea diving

C、air pressure under the surface of sea water

D、a kind of illness that man suffers in the sea

2．阅读理解

A diver’s body in deep water _______ .

A、is under great pressure

B、is just like that of a fish

C、suffers from the bends

D、 weighs very little

3．阅读理解

The passage does not say, but it makes you think that _______ .

A、deep-sea divers should be in good health

B、divers explore the deep sea only for treasure

C、diving under water too quickly causes a kind of illness

D、there is a special mixture of gases under the sea

4．阅读理解

Why does a diver get the bends?

A、He tries to do exercises under the water.

B、His diving suit weighs too much.

C、He comes to the surface too quickly.

D、The air in his blood is used up.

5．阅读理解

From the passage we can see that _______ .

A、the sea began to interest man in the last few years

B、man is not at home deep in the sea

C、all divers will get the bends sooner or later

D、the air in the seawater will kill a diver if he is not careful

Answer 1

楼上正解。

是BAACB

解释一下第3题，因为在潜水过程中容易造成疾病，所以推出潜水员要有一个好的身体，而C选项虽然可能对，但文中只是说了快速上升会产生疾病，下潜时没有提到，无法从文中推测出该结论

Answer 2

B、the problems man faces in deep-sea diving

A、is under great pressure

A、deep-sea divers should be in good health (i am not sure the answer because we can't diving under water too quickly because it get pressure. but it really causes a kind of illness if we diving under water too quickly)

C、He comes to the surface too quickly

B、man is not at home deep in the sea

Answer 3

这也行|！！！

Answer 4

标准答案：BACCB

Answer 5

BACCD