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 Biological Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clo
A Biological Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clo
admin
2015-07-06
73
问题
A Biological Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock tells【C1】______when to form flowers and when the flowers should open. It tells【C2】______when to leave the protective cocoons and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and anima【C3】______the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur【C4】______ the number of hours of daylight. In the short【C5】______of winter, its fur becomes white. The fur becomes gray brown in color in the longer hours of daylight in summer.
Inner signals control other biological clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration【C6】______twice each year. Birds【C7】______flying become restless when it is time for the trip,【C8】______they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which【C9】______of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain【C10】______to control the timing of some of our actions. These【C11】______tell a person when to【C12】______, when to sleep and when to seek food. Scientists say there probably are other biological clock cells that control other body activities.
Dr. Moorhead is studying【C13】______our biological clocks affect the way we do our work. For example, most of us have great difficulty if we must often change to different work hours.
【C14】______can take many days for a human body to accept the major change in work hours. Dr. Moorhead said industrial officials should have a better understanding of biological clocks and how they affect workers. He said【C15】______understanding could cut sickness and accidents at work and would help increase a factory’s production.
【C14】
选项
A、We
B、It
C、They
D、You
答案
B
解析
从句子结构中不难看出,to accept the major change in work hours是实际上的主语,而此处需要一个形式主语,所以只能选择It。
转载请注明原文地址:https://kaotiyun.com/show/E1hd777K
本试题收录于:
职称英语卫生类A级题库职称英语分类
0
职称英语卫生类A级
职称英语
相关试题推荐
NativeChineseartworkhasbeenenthusiasticallycollectedandstudiedabroadrecently.
AHistoryofAspirinBBadThingsaboutAspirinCOriginofAspirinDGoodThingsAboutAspirinEHowAspirinWorksinthe
AHistoryofAspirinBBadThingsaboutAspirinCOriginofAspirinDGoodThingsAboutAspirinEHowAspirinWorksinthe
1Americansthisyearwillswallow15,000tonsofaspirin,oneofthesafestandmosteffectivedrugsinventedbyman.Themost
Howmanydiseasesareknowntoattackwheat?Whatisthemainideaofthesecondparagraph?
Diet,AlcoholLinkedtoNearlyOneThirdofCancersDietissecondonlytotobaccoasaleading(51)ofcancerand,alongwithalc
Theresultsofthenewstudyareunexpected.Amongthescientiststhatdidthestudy,therearemoreChinesethanAmericans.
Therearealtogether13dragstreatingsleepdisordersintheUnitedStates.Sleep-walkingisalsooneoftheserioussideeffe
EatforaGoodandHealthfulLifeFood(1)usalive.Itisoursustenanceandourpleasure.Butrecently,researchhasshownthat
Tosolvetheproblemofdrymouths,oneisadvisedtotakecoolmilk.Geotheoftendidoutdoorskatingandswimming.
随机试题
关于溶栓药的作用及临床应用的说法,正确的有
执行入侵检测任务的硬件或软件统称为___________。
当代中国法的渊源不包括【】
A.变态反应性疾病B.罕见的白血病C.病毒性感染D.放射线照射E.疟原虫感染疾病淋巴细胞增高常见于
微分方程ydx+(x—y)dy=0的通解是:(C为任意常数)
备案机关发现建设单位存在下列行为中的(),有权要求重新组织竣工验收。
一次指数平滑法得到t+1期的预测值等于()。
教师职业的发展阶段是()。
长城的文明是一种僵硬的雕塑,都江堰的文明却是一种_________的生活。长城摆出一副老资格等待人们的修缮,都江堰却卑处一隅,像一位绝不炫耀、毫无所求的乡间老母,只知_________。填入划横线部分最恰当的一项是:
不考虑数据确认处理(加工2),请指出图3-17~图3-19数据流图中可能存在的错误。打印分户账清单(表3-8)时,必须以“(4)”作为关键字进行排序才能满足系统需求。A.储蓄所B.账号C.开户日D.户名E
最新回复
(
0
)