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
2010-11-02
32
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 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 Siberian 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 in 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 the 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.【C16】______ can take many days for a human body to【C17】______ a 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】______ .
【C2】
选项
A、walk
B、cry
C、guard
D、awaken
答案
D
解析
语义衔接题。结合空格后的并列动词sleep and seek food,此题可用排除法。生物钟可以告诉人和动物什么时候醒来(awaken),什么时候入睡,以及什么时候寻找食物。
转载请注明原文地址:https://kaotiyun.com/show/wLs7777K
0
大学英语六级
相关试题推荐
A、HegotangrywithhisbossB、HealwaysgottoworklateC、HewasfrequentlysickandabsentfromworkD、Hepreparedafinancia
PassageOneAliceWalkermakesherlivingbywriting,andherpoems,shortstories,andnovelshavewonmanyawardsandfell
Menseemtohavealwaystakenaninterestinmeteorites,butnotuntiltheearlynineteenthcenturyweretheseobjectsconsidere
A、Thegroupinamessystoreroom.B、Thegroupinaniceoffice.C、Thegroupinapoorlydesignedlivingroom.D、Alloftheabove
Agoodwaytogetinformationforessaysandreportsistointerviewpeoplewhoarcexpertsinyour【S1】______topicorwho
Iamoneofthemanycitypeoplewhoarealwayssayingthatgiventhechoicewewouldprefertoliveinthecountryawayfromth
Intheatmosphere,carbondioxideactsratherlikeaonewaymirror—theglassintheroofofagreenhousewhichallowsthesun’s
A、Thelectureswereallboring.B、Notallthelectureswereinteresting.C、Thelectureswereratherinteresting.D、Thelectures
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglassintheroofofagreenhousewhichallowsthesun’s
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglassintheroofofagreenhousewhichallowsthesun’s
随机试题
器官移植后各种体内插管的护理包括
患者男,1l岁。因外伤入院,需输血。进行交叉配血试验,如图示采血管为真空采血管的是
(2014年)下列关于雷诺模型律和弗劳德模型律的说法正确的是()。
红酒生产企业销售红酒收取的包装物押金应并入红酒销售额,征收消费税。()
三国时代,大陆居民开始有组织地开发台湾。宋、元时期,中国政府正式设官建制,管辖台湾、澎湖。()
《桃花扇》的作者是()。
材料:近年来,我国政府为了增加居民收入,扩大居民消费,保障人民生活,采取了一系列措施。如加强“三农”工作,增加农民收入;稳步推进医药卫生事业改革;实施更加积极的就业政策;加快完善社会保障体系;大力发展教育事业;维护社会稳定,促进社会和谐。分析材料所体现的
“万事如意”从哲学上违背了()。
服务证券是指以一定的服务或文体、艺术欣赏为内容的证券。根据上述定义,下列不属于服务证券的是( )。
Themanagerwonderedwhy________.Whichofthefollowingiscorrect?
最新回复
(
0
)