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__
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock__
admin
2009-06-15
58
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/r5md777K
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
Lookatthequestionsforthispart.Youwillhearapassageabout"AmericanWeighsIn".Youwilllistentoittwice.F
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Listentothefollowingdescriptionoffivepeopleanddecidewhatkindofpersoneachis.Forquestions9~13,choosethewo
Lookatthequestionsforthispart.Youwillhearapassageabout"LivingaLongLife".Youwilllistentoittwice.F
YouwillhearpartofaradioprogrammeinwhichawomancalledSylviaShortisinterviewedaboutherjob.Forquestions9-18,c
FRIENDSHIP0Ibelievethatnothingmattersasmuchashavingacoupleofreallygood00friends.Theyhelpyoufeell
THOMASEDISONOnthenightof21October1931,millionsofAmericanstookpartinacoast-to-coastceremonytocommemorate
Accordingtothepassage,whichofthefollowingstatementsisNOTtruewhenapersonisinastateofdeeprelaxation?Inthe
A.OuncesofwaterneededperdayB.ImportanceofwaterC.CompositionofwaterD.SignsofdehydrationE.SupplyofwaterF.Necessi
随机试题
A.磨切基牙牙体组织较少的是哪一种固定桥B.倒凹区牙面与基牙长轴之间构成角度C.就位道与脱位道之间形成的角度D.模型固定在观测台上,牙冠轴面最突点所画出的连线E.用来确定基牙的倒凹区和非倒凹,选择卡环类型,确定义齿共同就位道的仪器下述内容中,与
最常转移到局部淋巴结的肿瘤是
A.呋喃唑酮B.甲氧苄啶C.氧氟沙星D.磺胺嘧啶E.甲硝唑能引起儿童软骨发育不良的药物是()
根据《国务院关于投资体制改革的决定》,实行备案制的企业投资项目,一般由企业按属地原则向地方政府()备案。
利用气体火焰的热能将工件切割处预热到一定温度后喷出高速切割氧流,使金属燃烧并放出热量而实现切割的方法是( )。
人的抗辩,又称相对抗辩或主观抗辩,是票据债务人仅可以对特定的票据债权人提出的抗辩,包括()的抗辩。
公民、法人或者其他组织认为具体行政行为侵犯其合法权益的,可以自知道该具体行政行为之日起一定期限内提出行政复议申请,该期限为( )。
我国《婚姻法》规定,结婚必备的条件有
已知事件A与B互不相容,则=_______,=______,=______.
下列程序的运行结果是()。#includemain(){staticchara[]="Languagef",b[]="programe";char*p1,*p2;intk;p1
最新回复
(
0
)