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
81
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.
The selection says that every animal is a living radiator because it ______.
选项
A、produces heat in its body cells
B、burns fuel to produce heat
C、gives off heat through its skin
D、requires oxygen to produces heat
答案
C
解析
第一段第一句话解释了为什么every animal is a living radiator,是因为heat formed in its cells is given off through its skin,即细胞内产生的热量通过皮肤散发出去。
转载请注明原文地址:https://kaotiyun.com/show/ZP1O777K
0
考博英语
相关试题推荐
Thelowoperatingcostsoftheforeigncompanywill____thehighlaborcoststhebusinesspaysinitsowncountry.
ManydoubtiftheInternet,television,advancedcommunicationsorinstantfoodwillmakeourcountrya____societyanytimesoon.
Thisisamarketinwhichenterprisingbusinesses_____forthedemandsofteenagersandolderyouthsinalltheirrockmaniaand
Likemanyofmygeneration,Ihaveaweaknessforheroworship.Atsomepoint,however,wealltoquestionourheroesandourne
Thelowoperatingcostsoftheforeigncompanywill_____thehighlaborcoststhebusinesspaysinitsowncountry.
Duringthenormaldevelopmentofself,achildisaffectedbycertaininfluentialfactors.(1)Infantsformanattachmentwitht
Ifitistruethatmoralitycannotexistwithoutreligion,thendoesnottheerosionofreligionheraldthe______ofmorality?
Despitehisoccasionalfondnessforgambling,heisstillconsideredasagoodboy_____.
Formostofus,theworkisthecentral,dominatingfactoflife.Wespendmorethanhalfourconscioushoursatwork,preparing
Themajorityofpeople,aboutnineoutoften,areright-handed.【71】untilrecently,peoplewhowereleft-handedwereconsidered【
随机试题
疾病监测的基本方法是
网络水军,源于网上乱回帖,俗称“灌水”。他们一般受雇于网络公关公司,在网上通过发帖和回帖造势,有目的地进行各种炒作,形成不良舆论,催生各种侵权行为。根据以上定义,下列属于网络水军的是:
运用动态控制原理控制施工进度,质量目标除各分部分项工程的施工外,还包括()。
企业收到资产评估机构出具的评估报告后,将备案材料逐级报送给国有资产监督管理机构或其所出资企业,自评估基准日起9个月内提出备案申请。()
宋元时期是我国科技发展的第二个黄金时期,居于世界领先地位的科技成就有()。①沈括创制的“十二气历”②郭守敬的《授时历》③张衡发明的地动仪④印刷术、指南针、火药和火器的发明和使用
为了_________高等教育大众化、普及化的趋势与政府资金投入不足的矛盾,大多数国家,尤其是发展中国家,采取发展私立高等教育的对策。 填入横线处的词语.最恰当的一项是()。
下列关于汉字演变历程的叙述,错误的是()。
有以下程序,程序中库函数islower(ch)用以判断ch中的字母是否为小写字母#include<stdio.h>#include<ctype.h>voidfun(char*p){inti=0;while(p[i]){if(p[i]==’’
A、Topresentanawardtoamusician.B、Tothanktheorganizersof"TimeOutfortheArts."C、Toinvitemusicianstojointhecon
inthelistofgoodpoliciesinsocialcontact
最新回复
(
0
)