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
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock(5
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock(5
admin
2009-06-15
73
问题
A Special Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock(51)plants when to form flowers and when the flowers should open. It tells insects when to(52) the protective cocoon (防护卵袋) and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and animal(53)the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur because of the(54)of hours of daylight. In the short(55)of winter, its fur becomes white. The fur becomes gray brown in(56)in the longer hours of daylight in summer.
Inner signals control other(57)clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration(58)twice each year. Birds(59)from flying become restless when it is time for the trip,(60)they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which(61)of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain(62)to control the timing of some of our actions. These(63)tell a person when to wake, when to(64)and when to seek food. Scientists say there probably are other biological clock cells that(65)other body activities.
选项
A、functions
B、places
C、cells
D、actions
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/Ti1d777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Readthefollowingtextanddecidewhichanswerbestfitseachspace.Forquestions26~45,markoneletterA,B,CorDony
Readthefollowingarticleandanswerquestions19-25.Forquestions19-25,choosethecorrectanswerA,B,CorD.Mark
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Readthefollowingpassageandanswerquestions9-18.1.Ifsustainablecompetitiveadvantagedependsonwork-forceskills,Amer
Readthefollowingpassageandanswerquestions9-18.1.Ifsustainablecompetitiveadvantagedependsonwork-forceskills,Amer
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
Computerpeopletalkalotabouttheneedforotherpeopletobecome"computer-literate",inotherwords,tolearntounderstand
1.FilmisamediumthatmighthavebeenespeciallymadeforAmerica,avastcountrywhich,bythebeginningofthetwentiethce
Formuchofthepastdecade,AmericanandBritishscientistshavebeenannoyedbythephenomenonknownastheFrenchParadox.Nu
随机试题
某公司2011年及2012年有关财务资料如下:要求:利用杜邦分析体系全面分析企业运用资产获利能力的变化及其原因。
已知曲线y=ax3+bx2+cx在点(1,2)处有水平切线,且原点为该曲线的拐点,求a,b,c的值,并写出此曲线的方程。
A.疼痛B.发热C.恶心、呕吐D.腹胀E.呃逆外科手术后最常见的是
多次连续用药后,病原体对药物反应性逐渐降低,需增加剂量才能保持疗效,这种特性称为()。
某合作企业与保险公司签订了一份财产保险合同,保险标的为企业的厂房,保险费为3万元。投保后的第二年,该企业将有关设备转移并放火烧了破旧的厂房,并向保险公司谎称是因为雷电引起的厂房烧毁,据此要求保险公司赔偿。保险公司后来查明了厂房被烧毁的真正原因。在这种情况下
现金等价物是指企业持有的同时具有()特征的投资。
()核电站是中国第一座自行设计、建设的核电站,它的建成结束了我国内地无核电的历史,同时使我国成为继美国、英国、法国、苏联、加拿大、瑞典之后世界上第七个能够自行设计、建造核电站的国家。
functionalequivalence
以下程序中函数reverse的功能是将a所指数组中的内容进行逆置。voidreverse(inta[],intn){inti,t;for(i=0;i<n/2;i++){t=a[i];a[i]=a[n-1-
需求分析阶段最后提供的文档是软件的()。
最新回复
(
0
)