题目

阅读理解 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 deep­sea divers 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. It's not easy to explore the deep sea. A diver must have a way of breathing underwater. He must be able to protect himself from great pressure. The pressure of air is about 15 pounds on every square inch. But the pressure of water is about 1, 300 pounds on every square inch! The first diving suits were made of rubber. They had a metal helmet (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. （1） 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 （2） According to the text, what make(s) deep­sea diving difficult? A . The pressure of water. B . The temperature of water. C . The dangerous sea creatures. D . The heavy breathing equipment. （3） 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 （4） What do we know about William Beebe from 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. 答案： D A C A

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