专业英语考试四级阅读练习与解析(2)
文章出处： 发布时间：2006-07-09
A. It helps them to digest their food.
B. It helps them to protect themselves from danger.
C. It makes it easier for them to move through the mud.
D. It makes them attractive to fish.
2. The fourth paragraph of the passage primarily discusses______.
A. the reproduction of sea cucumbers
B. the food sources of sea cucumbers
C. the eating habits of sea cucumbers
D. threats to sea cucumbers’ existence
3. What can be inferred about the defence mechanisms of the sea cucumber?
A. They are very sensitive to surrounding stimuli.
B. They are almost useless.
C. They require group cooperation.
D. They are similar to those of most sea creatures.
4. Which of the following would NOT cause a sea cucumber to release its internal organs into the water?
A. A touch B. Food C. Unusually warm water D. Pollution.
1. B) 通过阅读文章可以排除选项A、C、D，因为文中没有提及，故选项B为正确答案。
2. C) 此题为段落主旨题。通过阅读第四段可知作者都是讲述海参的进食习惯，故选项C为正确答案。
3. A) 此题为推论题。根据最后一段可知海参在受到外界刺激时，会做出一定的反应，这也反映出它的防御机制非常敏感，故A为正确答案。
4. B) 此题为细节题。根据最后一段可知惟有food不会使海参将体内器官吐出来，故其为正确答案。
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