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
Every animal is a living radiator--heat formed in its cells is given off through its skin. Warm blooded animals maintain a stead
Every animal is a living radiator--heat formed in its cells is given off through its skin. Warm blooded animals maintain a stead
admin
2013-01-25
93
问题
Every animal is a living radiator--heat formed in its cells is given off through its skin. Warm blooded animals maintain a steady temperature by constantly replacing lost surface heat; smaller animals, which have more skin for every ounce of body weight, must produce heat faster than bigger ones. Because smaller animals burn fuel faster, scientists say they live faster.
The speed at which an animal lives is determined by measuring the rate at which it uses oxy gen. A chicken, for example, uses one-half cubit centimeter of oxygen every hour for each gram it weights. The tiny shrew uses four cubit centimeters of oxygen every hour for each gram it weights. Because it uses oxygen eight times as fast, it is said that the mouse-like shrew is living eight times as fast as the chicken. The smallest of the warm-blooded creatures, tile humming-bird, lives a hundred times as fast as an elephant.
There is a limit to how small a warm-blooded animal can be. A mammal or bird that weighted only two and a half grams would starve to death, h would bum up its food too rapidly and would not be able to eat fast enough to supply more fuel.
Warm-blooded animals maintain a steady temperature by ______.
选项
A、storing heat in their body cells
B、regulating the amount of heat produced
C、regulating the amount of heat given off
D、constantly replacing lost surface heart
答案
D
解析
第一段明确指出恒温动物通过constantly replacing lost surface heat来保持体温。
转载请注明原文地址:https://kaotiyun.com/show/4P1O777K
0
考博英语
相关试题推荐
The____ofhisfirstnovelappearedinTheTimesyesterday;nodoubthewasveryhappytoseethat.
Dogsaresocialanimalsandwithoutpropertraining,theywillbehavelikewildanimals.Theywillspoilyourhouse,destroyyo
Dogsaresocialanimalsandwithoutpropertraining,theywillbehavelikewildanimals.Theywillspoilyourhouse,destroyyo
Ingeneral,theamountthatastudentspendsforhousingshouldbeheldtoone-fifthofthetotalforlivingexpenses.
Sincetheearlynineties,thetrendinmostbusinesseshasbeentowardon-demand,always-availableproductsandservicesthatsu
Duringthenormaldevelopmentofself,achildisaffectedbycertaininfluentialfactors.(1)Infantsformanattachmentwitht
Ifitistruethatmoralitycannotexistwithoutreligion,thendoesnottheerosionofreligionheraldthe______ofmorality?
Formostofus,theworkisthecentral,dominatingfactoflife.Wespendmorethanhalfourconscioushoursatwork,preparing
TheSocialSecurityActdidnotincludehealthinsurancebecausethecommissionconsideredthatitsinclusionwouldjeopardizet
Themajorityofpeople,aboutnineoutoften,areright-handed.【71】untilrecently,peoplewhowereleft-handedwereconsidered【
随机试题
某展销会为了5月9日的开业庆典,于5月6日从灯笼坊租借门前悬挂的两只大红灯笼。庆典之日,工作人员不慎将灯笼毁坏,展销会主办方决定买下灯笼,遂于5月12日通过电话向灯笼坊表达购买之意,对方表示同意。5月16日,展销会主办方依约向对方支付了价款。灯笼所有权的转
“橡树、青草、花园、园丁”这些意象出自【】
下列配伍能降毒、除毒的是
按照《建设工程工程量清单计价规范》(GB50500-2008),其他项目清单一般包括()。
爆炸性气体等爆炸性物质可分为()等几类。
导游穿戴配饰的数量一次不宜超过()。
“火车教会人们守时,准时准点成了现代生活的准则,人们开始要随身带上一块表,时间概念是一个全新的概念。”这一现象最早出现于()。
我们要继续坚定地把改革开放伟大事业推向前进,这是因为()。
Whatistherelationshipbetweenthetwospeakers?
12ThingsI’veLearnedFromTravelingAroundtheWorldforThreeYearsOnMarch13,2007,Ihandedoverthekeystomyhouse
最新回复
(
0
)