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
专升本
Hibernation Hibernation is one of the main adaptations that allow certain northern animals to survive 【1】, cold winters. Hib
Hibernation Hibernation is one of the main adaptations that allow certain northern animals to survive 【1】, cold winters. Hib
admin
2012-05-23
45
问题
Hibernation
Hibernation is one of the main adaptations that allow certain northern animals to survive 【1】, cold winters. Hibernation is like a very deep sleep that allows animals to save their energy when there is little or【2】food available. The body functions of "true hibernators" go through several changes【3】they are hibernating. Body temperature drops, and the heart rate 4 . For example, a hibernating woodchuck’s body temperature drops by more than 30 degrees Celsius, and its heart rate is down from 80 to【4】beats per minute! Other true hibernators include the jumping mouse, little brown bat, eastern chipmunk, and several ground squirrels. Other animals, such as the skunk and raccoon, are not considered true hibernators,【5】they wake up in the winter to feed, and their body【6】do not change as much. Since they only sleep for a little bit at a time, the term dormancy or "light sleeping" is used to describe their behavior.
The largest animals to hibernate are bears. Their heart rate may slow down from a usual 40 -50 beats per minute to 8-12 beats per minute,【7】their body temperature changes very little, so they are able to wake up quickly.
Hibernating animals have a special substance in the blood called hibernation inducement trigger, or HIT. This substance becomes active in the fall, when the days become cooler and shorter. When HIT becomes active, the animals start【8】for winter. Some animals store food so that they can eat when they wake up, and some animals eat a lot in late summer and fall to add excess fat to their bodies. This fat keeps them warmer and acts【9】a source of energy while they are sleeping. Some animals also make changes to the places【10】they will sleep. They add leaves and grasses to keep them warm.
选项
A、temperature
B、rate
C、functions
D、substance
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/HjGC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Itwouldbe______togetasecondopinionbeforetakinganyfurtheraction.
Imadeitcleartothemthattheymusthandintheirpapersbeforeteno’clockinthemorning.
Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursethatheattendsgiveshimacre
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thismightbecalledlaziness,butDr.Kleitmanhasanew
Now,onlinelearninghasbecomeacceptableandcommonplace.Itisseenbystudentsandemployeesasamoreflexibleandconvenie
Thesearecommonmaterials______weareallfamiliar.
Oneshouldnotplantagardenthatistoolargeforhimtocarefor.(Line1,Paragraph5,Passage1)
ThewinddieddownandtheGreatwallatMutianyuwasbathedinwarmsunshineandclearbluesky.Thislengthofwallismuchle
ThewinddieddownandtheGreatwallatMutianyuwasbathedinwarmsunshineandclearbluesky.Thislengthofwallismuchle
ROUTE103—WESTBOUND(MALLOFSTARTOSUNSHINEBEACH)HowmanybusescantakeyoutoSunshineBeachfromKatella?
随机试题
监理合同约定,委托人免费提供给监理机构的测量设备,监理工作完成后,监理人( )。
曲线y=-x44+x2+2x与x轴所围成的图形的面积A=_____.
(2013年第159题)真核生物mRNA合成后的加工有
设备监理工程师对供应商的审查内容有( )
在旅游()等集合地点,导游领队应将文明旅游事项向游客进行重申。
有关剥夺政治权利的刑期及其计算,正确的说法是()。
求解二阶微分方程的初值问题
【21】【29】
--Mum,I’vebeenstudyingEnglishsince8o’clock.______IgooutandplaywithTomforawhile?--No,I’mafraidnot.Besides,
A、Takingajobinterview.B、Meetingacustomer.C、Givingawelcomespeech.D、Discussingaproject.A
最新回复
(
0
)