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 clock t
A Biological Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock t
admin
2009-06-15
44
问题
A Biological Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock tells(51)when to form flowers and when the flowers should open. It tells(52) 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 animal(53) the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur(54) the number of hours of daylight. In the short(55) 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(56) twice each year. Birds(57) flying become restless when it is time for the trip,(58) they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which(59) of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain(60) to control the timing of some of our actions. These(61) tell a person when to(62), 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(63) 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.
(64) 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(65) understanding could cut sickness and accidents at work and would help increase a factory’s production.
选项
A、prevented from
B、ordered by
C、helped by
D、intruded on
答案
A
解析
该句句子的主干是:主语birds,谓语become restless。所以,所填的词是过去分词,修饰 birds。从上下文表达的意思判断,ordered by(被命令)、helped by(被帮助)和intruded on (被强加)都不匹配,只有prevented from是合适的选择。
转载请注明原文地址:https://kaotiyun.com/show/dRhd777K
本试题收录于:
职称英语理工类基础题库职称英语分类
0
职称英语理工类基础
职称英语
相关试题推荐
FriendsMayBeKeytoLivingLongerLookingforthesecretofalonglife?Lookcloselyatyourfriends.Newresearchsugges
FriendsMayBeKeytoLivingLongerLookingforthesecretofalonglife?Lookcloselyatyourfriends.Newresearchsugges
FriendsMayBeKeytoLivingLongerLookingforthesecretofalonglife?Lookcloselyatyourfriends.Newresearchsugges
FriendsMayBeKeytoLivingLongerLookingforthesecretofalonglife?Lookcloselyatyourfriends.Newresearchsugges
Therisingcostoflivingisashardoncountryfamiliesasoncityfamilies.
PeopleinthepastheldthatthedifferencebetweenlifeanddeathThebraincontrolstheotherbodyactivitiesthrough
随机试题
A.地尔硫革B.洋地黄C.阿托品D.利多卡因E.胺碘酮治疗急性前壁心肌梗死并发心室纤颤最常用()
当事人在合同中约定了仲裁条款,出现下列哪些情况时,法院可以受理当事人的起诉?()。
(2007年)三角形物块沿水平地面运动的加速度为a,方向如图4—72所示。物块倾斜角为α。重W的小球在斜面上用细绳拉住,绳另端固定在斜面上。设物块运动中绳不松软,则小球对斜面的压力FN的大小为()。
根据《会计基础工作规范》的规定,会计工作岗位可以一人一岗、一人多岗或者一岗多人。但出纳人员不可以兼任的工作是()。
某职业责任保险单的保险期限是2007年5月1日至2008年4月31日,追溯日期为2006年1月1日。下列哪项的条件可以得到理赔?( )
{an}是一个等差数列,a3+a7-a10=8,a11-a4=4,则数列前13项之和是()。
蛋白质变性作用的特点是
(2008年单选42)在唐朝,皇帝针对“百官有司之所常行之事”,临时颁发的各种敕令,经过编录之后成为“禁违止邪”的“永为法则”。这种法律形式是()。
-1/4
以下程序的输出结果是【】。main(){char*p[]={"BOOL","OPK","H","SP"};inti;for(i=3;i>0;i--,i--)printf("%c",*p[i]);printf(
最新回复
(
0
)