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Animals have different ways of protectin

练习题库2022-08-02  86
问题 Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feathers, while others dig into the ground to find a warm wintertime home. Some animals spend the winter in a deep sleep because by going to sleep they avoid the time of the year when food is scarce and the temperatures are low. Their sleep is known asThere is much about hibernation that puzzles scientists. For example, they are wondering how hibernation came into being. Some scientists have explored the possibility that animals release a chemical that starts them hibernating.　　One thing that scientists are certain about is that animals hibernate only when it is cold. Hibernation is a seasonal practice．　　Some animals that fall into a winter time sleep are not true hibernators because they spend only a part of the cold season asleep. Bears, for example, can easily be awakened from their winter nap. They are not true hibernators.　　Sometimes it is difficult to determine whether a particular animal is a true hibernator. For example, some mice hibernate, but others do not. The same is true of bats. Some of them hibernate. Others do not.The underlined word “hibernation” in Paragraph 1 means ____.（　　）A. a sleep to avoid drinkingB． a behavior in hot weatherC． a sleep in the cold seasonD． an animal to practice sleep in winter
选项 A. a sleep to avoid drinking
B． a behavior in hot weather
C． a sleep in the cold season
D． an animal to practice sleep in winter
答案 C
解析 第一段倒数第二句是对“hibernation”的解释，即“hibernation”是冬天气温过低时动物所采取的通过睡眠的方式过冬的一种方法。C项符合题意，故选C。
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