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
Every living thing has what scientists call a biological clock that controls behavior. It tells plants when to【C1】______flowers
Every living thing has what scientists call a biological clock that controls behavior. It tells plants when to【C1】______flowers
admin
2013-07-30
40
问题
Every living thing has what scientists call a biological clock that controls behavior. It tells plants when to【C1】______flowers and insects when to leave the protective cocoon(茧)and fly away. And it tells animals and human beings when to【C2】______, sleep and seek food. It controls our body temperatures, the【C3】______of some hormones and even dreams.
Events【C4】______the plant and animal affect its actions. Scientists recently found that a tiny animal called Siberain hamster changes the color of its【C5】______because of the number of hours of【C6】______. In shorter days of winter its fur becomes white. The fur becomes gray-brown in longer【C7】______of daylight summer.
【C8】______signals control other biological clocks. German scientists found that some internal one seems to order birds to begin their【C9】______flights two times each year. Birds prevented from flying become【C10】______when it is time for the trip. 【C11】______they become calm again when the time of the flight has ended. A mix of outside and internal events controls some biological clocks; such things as heartbeat and the daily change from sleep to walking take place because of both external and internal signals.
Scientists are beginning to learn【C12】______parts of the brain contain biological clocks. A researcher at Harvard University, Dr. Martin Moore Ede, said a small group of cells near the front of the brain seemed to control the【C13】______of some of our actions. Probably there are other cells to control other body activities. He is studying【C14】______they affect the way we do our work. Most of us have great difficulty if we【C15】______often change to different work hours. It can【C16】______many days for a human body to【C17】______the major change in work hours. Industrial officials should have a better【C18】______of biological clocks and how they affect workers. He said such an understanding could【C19】______sickness and accidents at work, and would help increase【C20】______.
【C5】
选项
A、feather
B、skin
C、fur
D、peel
答案
C
解析
语义衔接题。空所在句的下句中的its fur提示本空答案为[C]。
转载请注明原文地址:https://kaotiyun.com/show/o297777K
0
大学英语六级
相关试题推荐
A、Thescientistsknowitisdefinitelygettingsmaller.B、Thescientistsknowitisnearextinct.C、Thescientistsstilldonot
Ifyouthinkwomenstillgainmoreeconomicbenefitthanmendofrommarriage,youmaybelivinginthepast.Today,menarebett
Ifyouthinkwomenstillgainmoreeconomicbenefitthanmendofrommarriage,youmaybelivinginthepast.Today,menarebett
Ifyouthinkwomenstillgainmoreeconomicbenefitthanmendofrommarriage,youmaybelivinginthepast.Today,menarebett
DoctorSheldonPollackwaschargedthat______.TheinvestigationofOntario’sCollegeofPhysiciansandSurgeonsistofind__
A、Amagazinereporterandaprofessorofpolitics.B、TVprogramhostessandaprofessorofhistory.C、Radioprogramhostessand
A、Hewantstobeacompetentgraduate.B、Hewantstobecomeacollegeteacher.C、HewantstostudyinOxfordUniversity.D、Hewa
It’sasimplecalculus,kidsandmoney:Frombirthuntilcollegegraduation,childrenconsumedollarslikethey’rechickennugge
It’sasimplecalculus,kidsandmoney:Frombirthuntilcollegegraduation,childrenconsumedollarslikethey’rechickennugge
随机试题
脊柱骨折的急救处理。
健康男婴,出生体重为3.5kg,身长为50cm、头围34cm,现在年龄为6个月,来医院做健康体检。预计该婴儿的体重是
在图示的同定坐标系Oxyz中,长方体作平移(或称平动)。长方体的自由度数为:
拱涵所需的拱涵支架是以()作为定额计算单位。
关于商业区位选择的说法错误的是()。
关于教学过程,下列说法错误的是
如未成年人甲父母双亡,祖父母去世。外祖父母年老体衰,甲又无兄弟姐妹,可担任他的监护人包括()。
有以下程序#include<stdio.h>intfuna(inta,intb){retuma+b;}intfunb(inta,intb){returna-b;}intsss(int(*t)(),intx,inty){retu
Manyteenagersthinkthattheirfriendscanunderstandthembetter.Tomakefriendsandcommunicationisveryimportanttoteen
Motivationisadifficultsubject______becausesomanydifferentfactorsinfluencetheinclinationtoact.
最新回复
(
0
)