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
65
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、flight
B、operation
C、movement
D、transportation
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/Ji1d777K
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
Readthefollowingarticleandanswerquestions9-18onthenextpage.Apples:TheLiveLongerFruit0.App
Readthefollowingpassageandanswerquestions9-18.1.Ifsustainablecompetitiveadvantagedependsonwork-forceskills,Amer
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
1.ItisbecauseofhisplaysthatShakespeareisnowconsideredthegreatestEnglishwriterinhistory.Theerainwhichheliv
1.Ancientpeoplemadeclaypotterybecausetheyneededitfortheirsurvival.Theyusedthepotstheymadeforcooking,storing
1.FilmisamediumthatmighthavebeenespeciallymadeforAmerica,avastcountrywhich,bythebeginningofthetwentiethce
1.FilmisamediumthatmighthavebeenespeciallymadeforAmerica,avastcountrywhich,bythebeginningofthetwentiethce
Formuchofthepastdecade,AmericanandBritishscientistshavebeenannoyedbythephenomenonknownastheFrenchParadox.Nu
Youseethisnoticeonyourschoolnoticeboard.SPECIALPEOPLE•Whoisthemostimportantperso
随机试题
女性,45岁,诊断为巨大结节性甲状腺肿,在颈丛麻醉下行一侧甲状腺全切,另一侧甲状腺大部切除术,术后第2天突然发生窒息,面肌和手足持续性痉挛。此时首要的处理是
黄连抗菌作用的成分()
尿流动力学检测的各项指标中,下列哪一项最能反映膀胱逼尿肌的功能
属于膏药类的药物是属于箍围类的药物是
按照《工程建设项目招标范围和规模标准规定》,凡在规定范围内的各类工程建设项目,达到()标准之一的必须进行招标。
下列影响股票投资价值的外部因素中,不属于宏观经济因素的是()
近年来,“网络微时代”对“微文化”的需求日益强烈,英国RTE公司的设计人员充分发挥智能手机触摸屏的优势,针对当代人内心的童趣及强烈的角色感,成功开发了一款休闲益智游戏,让人们利用零散的时间就能顺手玩上几分钟。目前该游戏全球下载量超过7亿次,为这家原来仅有1
应用层DNS协议主要用于实现哪种网络服务功能?
EmployeesattheMaroubraplantwere______thatoperationswouldceaseinapproximately6monthsandthatgenerousretirementpa
Thedistributorswillcollaborate______anAmericancompany.
最新回复
(
0
)