Question

  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. He must breathe air,so 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. He can wear a diving suit and have air pumped to him from above. He can carry a tank of air on his back and breathe through a nose and a mouthpiece. Water weighs 800 times as much as air. Too much 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 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.The bends can cause a diver to double up in pain. They can even kill him.

1. On the whole,this passage is about       .

   A. special mixtures of gases in the deep sea

   B. the problems man faces in deepsea diving

   C. air pressure under the surface of sea water

   D. a kind of illness that man suffers from in the sea

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

   A. deepdivers should be in good health

   B. divers explore the deep sea only for treasure

   C. diving under the water too quickly causes a kind of illness

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

4. From the passage we can see that         .

   A. the sea began to interest man a few years ago

   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 sea water will kill a diver if he is not careful

Answer 1

[文章大意]自古以來(lái)，海洋豐富的資源一直吸引著人類。然而，從事深水潛水探索卻不是一件輕松的工作。本文向我們介紹的就是深水潛水員所面臨的困難和挑戰(zhàn)。

1. B主旨大意題。由文章結(jié)構(gòu)可以看出，文章首先點(diǎn)明了海洋對(duì)人類的重大意義，然后提出了文章要說(shuō)明的主題：To explore deep water,man faces even more dangers and prob?lems.

2. A細(xì)節(jié)理解題。由第三段的最后一句"His body is under great pressure."可知答案為A.

3. A推理判斷題。最后一段告訴我們，潛水員在深水里要承受巨大的壓力，浮到水面時(shí)，水壓驟減，這對(duì)人體來(lái)說(shuō)是很大的挑戰(zhàn)。由此可以推斷，從事深海潛水工作的人的身體條件一定很好。

4. B推理判斷題。從文章內(nèi)容可知，人在深海潛水時(shí)，會(huì)面臨很多困難與挑戰(zhàn)。所以人在深海是很不舒適的。at home在這里是"舒服，自在"的意思。