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
35
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.
Scorpions injected with prostaglandins move to hot areas to ______.
选项
A、engage in greater activity
B、seek out a more iron environment
C、demonstrate that they are ill
D、develop a fever and fight bacterial infections
答案
D
解析
文章最后一段提到发烧是有一定好处的,可以抵御细菌的增长。因此,D 为正确选项。 A “从事更为剧烈的活动”;B “寻找更为严酷的环境”;C “显示他们病了”均不对。
转载请注明原文地址:https://jikaoti.com/ti/ZlisFFFM
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
ThespeakerthinksthattobeateacherismoredifficultthantobethepresidentoftheNEA.Thespeakerthoughthedidther
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,【C1】________buildsthecapacityforenergyoutputandphysi
Themainideaofthefirstparagraphisthat______.Westernersarefamiliarwiththejournalisticinterview______.
GoldwasdiscoveredinCalifornia______.
Mostscientistsblamepeople,atleastinpart,forglobalwarming.Now,someresearcherssaypeoplemaybepartlytoblamefor
【B1】Swedenhasgotapopulationofonly8million,butitisalargecountrywithanareaof450,000squarekilometers.【B2】The
LeadershiphasbecomeaspectatorsportinArizona.Everyflourishingregionneedspeoplewhoactasitsstewards.Suchleaders
随机试题
试算平衡表中一般每一大栏分设()两小栏。
以下运算实现在循环队上取队头,请在______处用适当的语句予以填充。intGetHead(CycqueueTpsq,DataType*x){if(sq.rear==______return(0);
北洋政府时期的官俸平时采用()
货币政策工具有
在阴阳失调的病机变化中,“阴”的含义指“阴邪”的是
患者,男,34岁。晨起突然排出大量柏油样黑便,并出现心悸、头晕、无力,诊断为胃溃疡大出血入院,医护人员对其进行抢救处理。经积极治疗后,患者康复出院,下列护士对患者文件处理哪项是错误的
为了降低市政建设中给排水工程的投资,改善环境卫生,缓和城市供水紧张而采用废水处理后回用的技术措施称为()。
对该案例特点不正确的描述是()。引发求助者心理与行为问题的直接原因是()。
王太太带着孩子们参加了赴日旅游团,导游好奇地问他们家有几个孩子,三个孩子争先恐后地抢着回答。一个孩子说:“我有两个哥哥,两个妹妹。”另一个说:“我有三个妹妹,一个哥哥。”第三个说:“我有一个妹妹,三个哥哥。”根据三个孩子的回答,以下哪项为真?
为考生文件夹下XIANG文件夹建立名为KXIANG的快捷方式,并存放在考生文件夹下的POB文件夹中。
最新回复
(
0
)