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
Running a fever was once thought to be the prerogative of warm-blooded creatures, whose internal temperatures are independent of
Running a fever was once thought to be the prerogative of warm-blooded creatures, whose internal temperatures are independent of
admin
2010-07-06
46
问题
Running a fever was once thought to be the prerogative of warm-blooded creatures, whose internal temperatures are independent of the weather. But, as Matthew Kluger reported in "The Importance of Being Feverish" January 1976, lizards can also develop fevers, even though there is no question that they are cold-blooded. They raise their temperatures by moving into the sun or, in the case of Kluger’s experiments, under a sun lamp. And it seems to do them some good. Sick lizards kept in cages at feverish temperatures fare much better than their counterparts in normal and cool environments.
Now ,fever has spread to invertebrates(无脊椎动物). Recent studies have shown that crayfish and scorpions can develop fevers. Crayfish injected with bacteria and scorpions injected with prostaglandins (前列腺素)swam and scuttled to hot areas. Prostaglandins are hormones thought to be instrumental in the development of a fever.
Evidence is also mounting that moderate fevers have their benefits, which might explain why the fever process is so widespread. Leukocytes, white blood cells that are active in fighting bacterial infections, are more mobile at febrile temperatures. And fevers reduce the amount of iron available to bacteria. That reduction, combined with high temperatures, has been shown to inhibit bacterial growth.
The passage implies that______.
选项
A、the fever process is widespread because moderate fevers have benefits
B、the reduction of fevers can inhibit bacterial growth
C、man can use sun lamp to raise lizards’ temperature
D、crayfish injected with bacteria have a purpose for moving to hot areas
答案
D
解析
从文中第二段“Crayfish injected…to hot areas.”可知D 正确。
转载请注明原文地址:https://kaotiyun.com/show/oyDd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
Childrenwhogriptheirpenstooclosetothewritingpointarelikelytobeatadisadvantageinexaminations,【C1】________toth
Childrenwhogriptheirpenstooclosetothewritingpointarelikelytobeatadisadvantageinexaminations,【C1】________toth
Childrenwhogriptheirpenstooclosetothewritingpointarelikelytobeatadisadvantageinexaminations,【C1】________toth
ThespeakerthinksthattobeateacherismoredifficultthantobethepresidentoftheNEA.Thespeakerthoughthedidther
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,【C1】________buildsthecapacityforenergyoutputandphysi
Whatisthepassagemainlyabout?Intermsofthescaleofthechange,whatdoestheauthorconsiderthepresentchange?
Whenwerethefirstx-raysdiscovered?
Thursday最后一个话轮交代了男士给出结果的时间:YoumaycallmeonThursdaynight,考生只要听清了这一句即可作答。
Thursday
随机试题
A.温胆汤B.归脾汤C.安神定志丸D.丹栀逍遥散(2007年第98,99题)不寐多梦,易于惊醒,胆怯心悸,遇事善惊,神疲体倦,自汗少气,脉细弱,治疗应选()
Playingthesportyoulikeisconsideredanessentialpartofaperson’slife.
下列腧穴中,位于瞳孔垂直线上的有
CT成像的物理基础是
关于无形资产使用寿命的确定,下列说法中错误的是()。
北京(天津)一遵化一唐山一乐亭一秦皇岛线包含的景点有()。
Linux系统中,为某一个文件在另外一个位置建立一个文件链接的命令为______。
Nowadaysmoreandmoreforeignenterprisesandcompaniesarenolonger【C1】______oninterviewsforrecruitment.Yearsofstudying
Thespeechcontestwillgivehimanopportunityto______histalent.
InBolivia,lifeisslowlyreturningtonormalafteralmostamonthofdemonstrations.【C1】______—frompoorpeasantfarmerstomi
最新回复
(
0
)