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  3. How Animals Keep Warm Man has invented ways to keep warm, but how do animals defend themselves? They cannot reason in the sen

How Animals Keep Warm Man has invented ways to keep warm, but how do animals defend themselves? They cannot reason in the sen

admin2012-12-22  62
问题             How Animals Keep Warm
   Man has invented ways to keep warm, but how do animals defend themselves? They cannot reason in the sense that man can, but nature has taken care of the animal kingdom by providing animals with special instincts. One of these instincts is known as hibernation.
   "Sleeping like a dormouse" is not only a common saying but is a reality. When winter comes, the dormouse and other hibernating animals have reached a well-nourished state. They eat very well in warmer days laying down fat in the tissues of their bodies and during hibernation this keeps them alive. Safe in their nests, or burrows, they sleep soundly until the warmth of spring arrives.
   Bats, tortoises, snakes, frogs, even insects like butterflies, hibernate more or less completely. Some, like the squirrels, sleep during coldest weather but are roused by a warm spell. During hibernation, the temperature of an animal’s body drops drastically. Breathing and heart-beats almost cease.
   Another instinctive method of avoiding intense cold is to escape by means of migration. Wild swans, seagulls, swallows and cuckoos are a few of the very many kinds of birds which fly thousands of miles, twice a year, to avoid cold. Many animals, especially those of the Arctic reindeer of Europe, move southward towards the forests when winter approaches. They return to the northern area when the warmth of spring begins to be sensed.
   There are animals which do not attempt to leave at the first sign of winter cold. Their instinctive means of defense is to dig out a deep burrow, made soft and warm by padding out with straw, leaves, moss and fur. In it they have a "secret place" containing food which they hope will last the winter through! Animals which fall into this class include the Arctic fox, the rabbit and the ermine, and the little field-mice.
选项 A、It moves about to keep warm.
B、It grows thicker fur.
C、It sleeps continuously.
D、It goes to warmer areas.
答案C
解析 问题问“睡鼠在冬季里是怎样抵御严寒的?”利用题干中的特征词dormouse作为答案线索，这样找到答案相关句，“Sleeping like a dormouse”…Safe in their (their 指代前面出现的“睡鼠”) nests，or burrows，they．sleep soundly until the warmth of spring arrives．该句说“它们(睡鼠)安全地呆在巢穴里，它们睡得很好，一直要睡到温暖的春天到来(才会醒过来)”，因此判断答案是C。
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本试题收录于： 职称英语综合类C级题库职称英语分类
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