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、shape
B、type
C、color
D、form
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/xi1d777K
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
Readthefollowingarticleandanswerquestions19-25.Forquestions19-25,choosethecorrectanswerA,B,CorD.Mark
Readthefollowingpassage.Eightsentenceshavebeenremovedfromthearticle.ChoosefromthesentencesA~Htheonewhich
Readthefollowingpassages,eightsentenceshavebeenremovedfromthearticle.ChoosefromthesentencesA~Htheonewhich
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Whatdoyouthinkofwhenyouhearthewordmotherhood?Ifyouarelikemostpeople,youassociatemotherhoodwithanumberofp
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
1.ItisbecauseofhisplaysthatShakespeareisnowconsideredthegreatestEnglishwriterinhistory.Theerainwhichheliv
Formuchofthepastdecade,AmericanandBritishscientistshavebeenannoyedbythephenomenonknownastheFrenchParadox.Nu
随机试题
焊接电弧是由()组成的。
Nobodywas______intheofficewhenthemanagersuddenlyhadaheartattack.
空腹痛常见于()
关于金锁固精丸主治病证的描述中下列何项是错误的
男性,14岁。颈淋巴结肿大2周,取淋巴结活检提示:淋巴结构破坏,可见RS细胞。可诊断为
根据企业所得税的规定,企业发生的下列支出中准予在税前扣除的有()。
对于夏季防雷常识,下列选项中论述正确的是()。
知识产权是指民事主体(自然人或法人)对自然人通过智力劳动所创的智力劳动成果,依法确认并享有的民事权利,是权利人对所创造的智力劳动成果所享有的财产权利。通常是家赋予创造者对其智力成果在一定时期内享有的专有权或独占权。各种智力创造比如发明、文学和艺术作品,以
设
EveryoneremembersthewhitewashingsceneinTheAdventuresofTomSawyer.Buthowmanyrecallthescenethatprecedesit?Havin
最新回复
(
0
)