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
36
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.
Fevers cause______.
选项
A、prostaglandins to be formed
B、iron to be made available to bacteria
C、leukocytes to be more mobile
D、lizards to be cold-blooded animals
答案
C
解析
发烧会导致什么后果?A “形成前列腺素”,颠倒了因果关系,前列腺素的形成会导致发烧,而不是相反。B 与文中“And fevers reduce the amount of iron available to bacteria”的意思刚好相反。 D “使白细胞更加活跃”与文中的“Leukocytes,white...temperatures”一致,是正确选项。
转载请注明原文地址:https://kaotiyun.com/show/byDd777K
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
Thebestestimateofhumanity’secologicalfootprintsuggeststhatitnowexceedstheEarth’sregenerativecapacitybyaround20
Thebestestimateofhumanity’secologicalfootprintsuggeststhatitnowexceedstheEarth’sregenerativecapacitybyaround20
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,【C1】________buildsthecapacityforenergyoutputandphysi
Bythe1820’sintheUnitedStates,whensteamboatswerecommononwesternwaters,theseboatsweremostlypoweredbyenginesbu
【B1】Swedenhasgotapopulationofonly8million,butitisalargecountrywithanareaof450,000squarekilometers.【B2】The
随机试题
异步串行通信的主要特点是通信双方不需要同步,没有专门的_______字。
甲公司持有乙公司150万债券。1999年12月28日,甲公司兼并乙公司。在此以前,1999年9月20日,甲公司以100万乙公司债券为丙公司与丁公司的买卖合同提供质押,担保丙公司在2000年3月10日债务履行期限届满时向丁公司清偿全部债款。到2000年3月1
甲公司于6月1日通过报纸发布广告,称其有某型号的电脑出售,每台售价8000元,随到随购,数量不限,广告有效期至6月30日。乙公司委托王某携带金额16万元的支票于6月28日到甲公司购买电脑,但甲公司称广告所述电脑已全部售完。乙公司为此受到一定的经济损失。根据
简述维护和促进教师心理健康的方法。
碘是人体必需的元素,但是统一在食盐中添加碘的方式可能导致“补碘”过量,某些非缺碘地区增售无碘盐,人们可以根据具体情况自主调节摄碘量。该材料体现的哲理有()。
在对道德两难故事“海因茨偷药”进行评判时,小明认为海因茨偷药会被警察抓起来,所以他不应该偷药。按照科尔伯格的道德发展阶段理论,小明的道德发展阶段处于()。
Scientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteria.TheChineserese
Itmaynothavegeneratedmuchinterestoutsideenergyandinvestmentcircles,butarecentcommentbyTidewater,Inc.president
HowtoapproachSpeakingTestPartOne•Inthispartofthetestyouanswerquestionsaboutyourselfandexpresspersonalopi
Thefundisfor______distressamongthefloodvictimsinthesoutherncity.
最新回复
(
0
)