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Animals have different ways of protectin
Animals have different ways of protectin
题库
2022-08-02
59
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 as
There 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.Hibernation is a seasonal practice. This means it ____.( )A. takes place only during a particular seasonB. only a few animal do this practiceC. is a month practiceD. only happens when a species becomes over-populated
选项
A. takes place only during a particular season
B. only a few animal do this practice
C. is a month practice
D. only happens when a species becomes over-populated
答案
A
解析
“hibernation”既然是一个“seasonal practice(季节性的做法)”,可以推测它可能仅发生在特定的季节。只有A项符合题意,故选A。
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