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
81
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、sleep
B、lie
C、stand
D、walk
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/fymd777K
本试题收录于:
职称英语卫生类A级题库职称英语分类
0
职称英语卫生类A级
职称英语
相关试题推荐
Youwillheartwoconversations.Writedownonewordornumberinthenumberedspacesontheformsbelow.CONVERSATION1(Que
Youwillhearaconversationandrecordedmessage.Writedownonewordornumberineachofthenumberedspacesontheforms
Listentothefollowingdescriptionoffivepeopleanddecidewhatkindofpersoneachis.Forquestions9~13,choosethewo
YouwillheararadiointerviewwithMikeReynolds,whosehobbyisexploringundergroundplacessuchascaves.Forquestions9-1
ANUNUSUALSWIMMINGCLUBMembersofaspecialclubinBritaincheerfullyleavethewarmthCHEERoftheirbeds,
Whatisthewriter’smainpurposeinwritingthistext?Whatdoesthewriterthinkabouttheholidayvillage?
WILLIAMTHEHERO!BraveWilliamBaldock,whoissixyearsold,isaheroafterhelpinghismotherwhenshefelldownstairs
YouwillhearSusannaleavingaphonemessageforhermother.Listenandcompletequestions21-25.Youwillheartheinformation
Inwhichareaissuccessfulinthenation?Thenationalgoalsforwomen’shealthmakeiteasierto
IrradiatedFoodIrradiating(照射)fruits,vegetable,porkandchickentokillinsectsandbacteriahasbeenapprovedbytheFo
随机试题
行政处罚的一般程序有()。
《中共中央关于全面推进依法治国若干重大问题的决定》指出,面对新形势新任务,我们党要更好统筹国内国际两个大局,更好维护和运用我国发展的重要战略机遇期,更好统筹社会力量、平衡社会利益、调节社会关系、规范社会行为,使我国社会在深刻变革中既生机勃勃又井然有序,实现
根据合伙企业法律制度的规定,下列关于合伙企业特征的表述中,正确的有()。
在数据分析中离散程度测度的引入有何意义?
区分新事物和旧事物的标志在于看它们()。
A、足三里B、阳陵泉C、悬钟D、足临泣E、任脉八脉交会穴中通带脉的是
下列降低建筑外围护结构温度的措施中错误的是()。
某市化妆品生产公司为增值税一般纳税人,兼营商品加工、批发、零售和进出口业务,2019年7月相关经营业务如下:(1)进口高档化妆品一批,支付国外的买价220万元、购货佣金6万元、国外的经纪费4万元;支付运抵我国海关地前的运输费用20万元、装卸费用和保险费用
简述加涅的学习分类。
A、Theuser’sposition.B、Thespeedofthesatellites.C、Thedistancetodestination.D、Theinformationtotheearth.A
最新回复
(
0
)