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
57
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
WorldleadersmetrecentlyatUnitedNationsheadquartersinNewYorkCitytodiscusstheenvironmentalissuesraisedattheRio
Childrenwhogriptheirpenstooclosetothewritingpointarelikelytobeatadisadvantageinexaminations,【C1】________toth
Childrenwhogriptheirpenstooclosetothewritingpointarelikelytobeatadisadvantageinexaminations,【C1】________toth
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,【C1】________buildsthecapacityforenergyoutputandphysi
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,【C1】________buildsthecapacityforenergyoutputandphysi
GoldwasdiscoveredinCalifornia______.
Thursday
随机试题
小儿腹泻中度脱水时,累计损失量为
患者,男,32岁。小便频数,白如米泔,凝如膏糊,舌淡苔白,脉沉。治宜选用()
肠内营养的优点有()。
股东大会就发行证券事项作出决议,须经出席会议的股东所持表决权的()以上通过。
企业解散或破产后的清算所得,属于企业所得税的征税范围。()
A、 B、 C、 D、 D图形中直线数依次是16、13、10、7、(4),是公差为一3的等差数列。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
A、 B、 C、 D、 B
CollegeStudyingI.(1)_____ofpreparationforcollegestudying—Collegestudyingiswellacceptedbothintheoryandinpractic
Anewstudyusesadvancedbrain-scanningtechnologytocastlightontoatopicthat【M1
最新回复
(
0
)