题目内容
15.The sea has always interested man.From it they can get food,minerals,and treasure.(151)C But he could not go far beneath its surface (152)G.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(153)E.He can carry a tank of air on his back and breathe through a nose and mouth piece.Water weighs 800times as much as air.Tons of water pushes against a diver deep in the sea (154)A.When a diver is under great pressure,his blood takes in some of the gases he breathes.As he rises to surface,the water pressure less.If the diver rises too quickly,the gases in his blood form bubbles (气泡).The diver is then suffering from the bends (潜水夫病).The bends can cause a diver to double up in pain(155)D.A.His body is under great pressure.
B.Scientists are trying to find more about the sea.
C.For thousands of 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.
分析 本文属于说明文阅读,作者通过这篇文章主要向我们描述了人们想要探索深海,但是危险重重,潜水员再遭受弯曲,导致潜水员加剧疼痛甚至死亡.
解答 151.C.推理判断题.根据后文But he could not go far beneath its surface 可知几千年来,他可以航行在它海面上;故选C.
152.G.推理判断题.根据后文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可知人们想要探索深海;故选G.
153.E.推理判断题.根据前文A diver who wants to stay under water for more than a few minutes must breathe air or a special mixture of gases可知他可以穿潜水服,从上面抽气给他;故选E.
154.A.推理判断题.根据后文When a diver is under great pressure,his blood takes in some of the gases he breathes可知他的身体承受着巨大的压力;故选A.
155.D.推理判断题.根据前文The diver is then suffering from the bends (潜水夫病).The bends can cause a diver to double up in pain可知这种疼痛甚至可以杀死他;故选D.
点评 七选五阅读是完成性阅读,和完形填空很类似,不同的是一个选词,一个选句子.解题时,要注意上下文语境,充分考虑信息词(选项中和空格前后句子中相同或相近的词),选出最符合语境的句子.