B ★★★☆☆ One part of the world is still largely unexplored. It is the deep sea. Over the years,many people have explored under the sea. But the first deep-sea wanted to find sunken treasure. They weren� 题目和参考答案——青夏教育精英家教网—

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★★★☆☆

One part of the world is still largely unexplored. It is the deep sea. Over the years,many people have explored under the sea. But the first deep-sea (潜水员) wanted to find sunken treasure. They weren’ t really interested in studying the creatures of life there. Only recently have they begun to learn some of the mysteries of the sea.

not easy to explore the deep sea. A diver must have a way of breathing underwater. He mus be able to protect himself from great pressure (引力) .The pressure of air is ábout 15 pounds or every square inch. But the pressure of water ii about 1,300 pounds on every square inch!

The first 叹似治(潜水服) were made rubber. They had a metal 心/w以(头盔) with windows in it. The shoes were made of lead and weighed twenty pounds each!These suits let divers go down a few hundred feet,but they were no good for exploring the very deep waters. With a metal diving suit,a diver could go down 700 feet. Metal suits were first used in the 1930s.

In 1927, .a diver named William Beebe wanted to explore deeper than anyone had ever gone before. He was not interested in finding treasure. He wanted to study the creatures and plants of the sea. His friend invented a metal ball called the Bathysphere. It weighed more than 5 ,000 pounds,but in it Beebe went down 3 ,028 feet. He saw many things that had never been seen by humans before.

25. People who first explored the deep sea hoped to

A. learn about the animals and plants of the sea

B. solve some mysteries about the sea

C. have an exciting trip in the sea

D. discover treasure under the sea

26. According to the text,what make (s) deep-sea diving difficult?

A. The pressure of water.

B. The temperature of water,

C. The dangerous sea creatures.

D. The heavy breathing equipment.

27. Compared with rubber diving suits,metal diving suits .

A. had windows in the metal helmet

B. weighed twenty more pounds

C. were good for exploring deeper waters

D. began to be used much earlier

28. What do we know abou Wiman Beeb roni the text?

A. He broke the diving record in his time.

B. He failed to find the treasure he wanted.

C. He met something terrible under the sea.

D. He was the first diver to explore the deep sea.

25.D 26. A 27. C 28. A

本文是说明。文章主要介绍了深海探险的相关知识。

25.D细节理解题。根据第一段中的 But the first deep-sea divers wanted to find sunken treasure 可知，人们最处测深海是想寻找沉入海底的金银财宝。

26. A.细节理解题。根据第二段中的 He must be able to protect himself from great pressure ... the pressure of water is about 1. 300 pounds on every square inch可知，水压很大，这使得在深海中潜水非常困难。

27. C.细节理解题。根据第三段中的 These suits let divers go down a few hundred feet,but they were no good for exploring the very deep waters 和 With a metal diving suit,a divei could go down 700 feet可知，与橡胶潜水服相比，金属潜水服可以帮助人测较深的水域。

28. A.推理判断题。根据最后一段中的-William Beebe wanted to explore deeper than anyone had ever gone before 和 Beebe weilt down 3.028 feet. He saw many things that had never been seen by huma?s before 可推断，Beebe通国探海球(the Bathysphere) 探测到了更深的海域，打破了以往的潜水记录。