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
67
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.
Which of the following best states the main idea of the passage?
选项
A、Cold-blooded animals can develop fevers.
B、There are benefits to developing fevers.
C、Fevers inhibit bacterial growth.
D、Lizards can develop fevers.
答案
A
解析
该题是一道主旨题,考查对全文整体上的理解与把握。这篇文章是一篇科技文章,主要介绍了冷血动物也会发烧,并以蜥蜴、淡水鳖和蝎子为例简要地讲了其症状和影响。因此A 最能概括文章的主要内容。其余3个选项是文章中的部分细节,无法涵盖文章的主要内容。
转载请注明原文地址:https://kaotiyun.com/show/IyDd777K
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
WorldleadersmetrecentlyatUnitedNationsheadquartersinNewYorkCitytodiscusstheenvironmentalissuesraisedattheRio
Childrenwhogriptheirpenstooclosetothewritingpointarelikelytobeatadisadvantageinexaminations,【C1】________toth
Thebestestimateofhumanity’secologicalfootprintsuggeststhatitnowexceedstheEarth’sregenerativecapacitybyaround20
Duetohistoricalreasons,peopleintheCzechRepubliclacked________.TheseminarIvoJupavisitedbyaccidentcompletely____
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,【C1】________buildsthecapacityforenergyoutputandphysi
Themainideaofthefirstparagraphisthat______.Westernersarefamiliarwiththejournalisticinterview______.
Friday本题答案信息也是隐含在最后一个话轮男士的最后一句中:...orjustcomehereonthenextmorningtogettheresult。这一题与上一题的听音和答题紧密相关,因为前面说的是Thursday(星期
Astelevisionbringssomeunfavorableeffectsonpeople,somesuggestthatweshoulddoawaywithtelevision.Sinceyouconsider
Mostscientistsblamepeople,atleastinpart,forglobalwarming.Now,someresearcherssaypeoplemaybepartlytoblamefor
随机试题
以下哪门不属于医学心理学分支
商业银行在采用标准法计算操作风险监管资本时,下列()业务条线对应的β系数是18%。
行业根据其与经济周期关联性的大小可分为()。
()实际上是计时工资的一种转化形式。
下列属于完全竞争市场的缺陷的是()。
法约尔的统一指挥原则认为()。
A.肾上腺皮质腺瘤B.Cushing病C.异位ACTH综合征D.单纯性肥胖E.肾上腺皮质癌大剂量地塞米松抑制试验可被抑制
Text文本框接受的最长字符数由文本框的______属性确定。
有如下程序:#include<iostrearn>usingnamespacestd;intmain(){inti,s=0;for(i=1;s<20;i+=2)s+=i*i;cout<<i<<endl;return0;}运行这个
GlobalShortageofFreshWaterManypeoplebelievethatfreshwaterisinexhaustibleinsupplyandalwaysavailableforuse.
最新回复
(
0
)