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
2013-06-02
15
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】______.
【C2】
选项
A、cry
B、guard
C、awaken
D、walk
答案
C
解析
语义衔接题。由空后的sleep可推断出本空是说什么时候醒来,故答案为[C]。其他选项都不属于生物钟的范畴。
转载请注明原文地址:https://jikaoti.com/ti/LB5FFFFM
0
大学英语六级
相关试题推荐
ARVshaven’tbeenusedwidelytopreventHIVtransmissionorinfectionforlackofmoney.Bothmother-to-childtransmissionand
ARVshaven’tbeenusedwidelytopreventHIVtransmissionorinfectionforlackofmoney.AccordingtoDr.PeterDiot,______c
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined.C.R.Darneshassuggestedthatitisaspropert
A、Thefast-developingtechnology.B、Thepeoplewhodesigndifferentapplications.C、ThewayhowpeoplemakeuseoftheInternet.
ScientistshavelongbelievedonewaytostoptheEarth’satmospherefromwarmingisbyplantingmoretrees.Theideaisthatm
LastAugustSusanand42otherstudentsgotwetanddirtywhile(36)______6tonsofgarbagefromtheriverrunningacrosstheir
Iamamotherofthree(ages14,12,3)andhaverecentlycompletedmycollegedegree.ThelastclassIhadtotakewasSociolog
Iamamotherofthree(ages14,12,3)andhaverecentlycompletedmycollegedegree.ThelastclassIhadtotakewasSociolog
FlirtWithSuicideThelifeofDavidWoodswasthestuffofanAustralianboy’sdream.Heplayedprofessionalrugbyleaguef
A、Englishteachersusuallylikereadingalot.B、TheEnglishliketoreadalotandlistentomusic.C、NoteveryonefromEngland
随机试题
Eachday,computershelpmillionsofpeopledotheirjobsmoreeffectively.Forexample,theycanhelpmanagersdecideonafutu
突增年龄指
原子吸收分光光度法测定水样中铁、锰等离子时,通常加入另一种金属离子与干扰物如磷酸盐、硅酸盐、铝酸盐等含氧阴离子形成难解离的稳定化合物而释放出待测元素,在下列各项中,通常加入的离子是
患者右下后牙拔除。术中因牙龈分离不全引起撕裂。术后压迫止血。术后2小时出现牙龈出血。处理方法是
某皮鞋厂制帮车间女工,工龄3年,近来常有头痛、头晕、乏力、月经过多等症状,多次化验检查WBC波动在3×109/L,血小板低60×109/L。该女工应考虑患的是()
场地内的供水方式中的一种是由城市供水系统管网供给,需了解城市供水管网布置情况,与场地连接点的()。
L/O系统主要有三种方式来与主机交换数据,它们是(13)、(14)和(15)。其中(13)主要用软件方法来实现,CPU的效率低;(14)由硬件和软件两部分来实现,它利用专门的电路向CPU中的控制器发出I/O服务请求,控制器则(16)转入执行相应的服务程序;
Whodoyouthinkreallylostfivepounds?Whichofthefollowingisuntrue?
A、Hedisagreeswiththewoman.B、Heagreeswiththewoman.C、Heholdsaneutralattitude.D、Hehasnocomment.B男士的话Theirsensit
A、Thedaydreams.B、Therememberingofone’sdream.C、Therapideyemovement.D、Themovingpictureoneseesinhisdream.C
最新回复
(
0
)