首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Man has invented ways to keep warm, but how do animals defend themselves? They cannot reason in the sense that man can, but natu
Man has invented ways to keep warm, but how do animals defend themselves? They cannot reason in the sense that man can, but natu
admin
2013-12-08
100
问题
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(冬眠).
"Sleeping like a dormouse(睡鼠)" is not only a common saying but 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 heartbeats almost cease.
Another instinctive methods 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 regions, have summer and winter quarters. The Arctic deer of North America, as well as the 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(貂)and the little field-mice.
During hibernation, animals breathe______.
选项
A、normally
B、at a much slower rate
C、at a faster rate
D、irregularly
答案
B
解析
本题为事实细节题,提问的是动物冬眠时的呼吸情况。根据第二段最后一句话“Breathing and heartbeats almost cease.”可知,冬眠中的动物的呼吸几乎停止,所以答案为B)。
转载请注明原文地址:https://kaotiyun.com/show/QgDO777K
0
成人本科学位英语
相关试题推荐
Treesshouldonlybepruned(修剪,整枝)whenthereisagoodandclearreasonfordoingsoand,fortunately,thenumberofsuchrea
Treesshouldonlybepruned(修剪,整枝)whenthereisagoodandclearreasonfordoingsoand,fortunately,thenumberofsuchrea
Theoldideathattalentedchildren"burnthemselvesout"intheearlyyears,and,therefore,aresubjectedtofailureandatwo
Forthispart,youareallowedthirtyminutestowriteacompositionofnolessthan120wordsonthetopic"TheReasonsWhyAdu
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsforreducingtheeffectsofextremeheat.Oneadaptat
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsforreducingtheeffectsofextremeheat.Oneadaptat
随机试题
一名患急性喉炎的小儿,安静时可听到喉呜,并有吸气性呼吸困难,听诊可闻管状呼吸音,患儿心率加快,约130次/分,该患儿喉梗阻程度为
混凝土的耐久性不包括()。
汽车库是用于停放由内燃机驱动且无轨道的客车、货车、工程车等汽车的建筑物,其按照停车方式的机械化程度可分为()。
下列经济业务事项应登记备查账簿的有()。
【2014山东济南】子曰:“知之者不如好之者,好之者不如乐之者。”这句话所强调的影响学习的因素是()。
(2017·内蒙古)心智技能形成中出声的外部言语阶段、不出声的外部言语阶段和内部言语阶段可以合称为()
皮亚杰认为,公正阶段的儿童往往更多地从行为的_________而不单纯是行为的后果来判断行为的责任。
“良机对于懒惰没有用,但勤劳可以使平凡的机遇变成良机。”这说明()。
下列各句没有语病的一句是()。
因西花村附近的华能金陵电厂要扩建。政府向村民征用了土地。虽然已经按规定向村民发放了补偿款。但部分村民仍不满意,要求提高补偿标准增加补偿费。在没有及时得到答复的情况下。他们就到镇政府门口聚集闹事。堵塞交通,领导让你去处理此事,你会怎么办?
最新回复
(
0
)