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】______ flower
Every living thing has what scientists call a biological clock that controls behavior. It tells plants when to 【C1】______ flower
admin
2010-12-04
61
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 can 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 biologicaI 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】______ call 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】______ .
【C16】
选项
A、He
B、They
C、It
D、This
答案
C
解析
惯用搭配题。我们看到take一词,而且后面又有to do sth. ,因此这个句型应该是:it takes some time to do sth. 。It在本句作形式主语.后文的动词不定式短语才是真正的主语。
转载请注明原文地址:https://kaotiyun.com/show/Res7777K
0
大学英语六级
相关试题推荐
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeopleareanxiousand【B1】______;thatis,theyareexces
BirthControlThetermbirthcontrolreferstothevolitional(自觉的)controlofthenumberandspacingofchildreninafamil
Man,eveninthelowerstagesofdevelopment,possessesafacultywhich,forwantofabettername,IshallcallNumberSense.T
A、Dr.Johnson’sclassisalreadyfull.B、Thereservedspacesareforfacultyonly.C、Hewillgivethestudentachanceaftershe
Thebiographerhastodancebetweentwoshakypositionswithrespecttothesubject(研究对象).Tooclosearelation,andthewriter
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themakingandsellingofdrugshavealonghistoryandarecl
Four-year-ridchildrenarebeingtestedfortheirabilitytorecognizesimplewordsandlettersinthe【B1】______.Theyarealso
Sexprejudicesarebasedonandjustifiedbytheideologythatbiologyisdestiny.Accordingtothisideology,basicbiological
AroundtheWorldinEightMegabytesWhenMicrosoftputtheoriginalFlightSimulatorprogramontothemarket,intheearly1
A、Blur.B、TheGood,TheBadandTheUgly.C、Gorillaz.D、TheGood,TheBad&TheQueen.D短文说,Damon现在的乐队名称是TheGood,TheBad&
随机试题
驾驶机动车在雨天起步前要使用刮水器。
A.单体酶B.寡聚酶C.结合酶D.多功能酶E.单纯酶(2002年第97题)由于基因融合,形成由一条多肽链组成却具有多种不同催化功能的酶是
在同一城市,对中央和地方的建设项目征地,按不同标准收取新菜地开发建设基金费用。()
下列不属于房地产开发企业的利润的是()。
【2011年第82题】高层建筑按9度抗震设计时,梁柱中心线之间的偏心距不应大于柱截面在该方向宽度的:
在制定培训规划时,工作说明的内容包括()
下列哪组词语全都与端午节有关?()
【《航海条例》】(NavigationActs)北京大学2001年欧美近现代史真题;北京师范大学2003年世界近现代史真题;北京师范大学2003年世界近现代史真题;华中师范大学2014年世界史基础真题
【2011广东商学院单选题第8题】广义资本市场,又称长期资金市场,包括两大部分()。
SpeakerA:Whyweren’tyouatschoolyesterday?SpeakerB:【D1】______SpeakerA:Whatwaswrongwithyou?SpeakerB:Mystomach
最新回复
(
0
)