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
2013-10-25
25
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 animal【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.
【C8】
选项
A、and
B、but
C、therefore
D、however
答案
B
解析
句意:……当迁徙季节结束,它们又恢复平静。本处前后两个句子关系呈现转折的关系,故A项和D项排除。however和but二者都意为“可是,但是”;but是并列名词,连接两个并列分句,上下二句在总的意义上构成了对比。however不能直接连接两个分句。必须另起新句,并用逗号隔开。所以本题选B。
转载请注明原文地址:https://kaotiyun.com/show/DHmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Youwillhearfivepeoplegivingtheiropinionsonchanginginlife.Forquestions9-13,choosefromthelistA~Fwhateach
Lookatthequestionsforthispart.Youwillhearapassageabout"LivingaLongLife".Youwilllistentoittwice.F
Lookatthequestionsforthispart.Youwillhearapassageabout"LivingaLongLife".Youwilllistentoittwice.F
Youwillhearfivepeopletalkingabouttheshortcoursestheyattended.Forquestions9-13,choosefromthelistA-Fwhate
Lookatthequestionsforthispart.Youwillhearapassageabout"LivingaLongLife".Youwilllistentoittwice.F
Whatisthewritertryingtodointhetext?WhatproblemdoesElizabethhavewithlivinginsuchatallbuilding?
JohnFisher,abuilder,andhiswifeElizabethwantedmorelivingspace,sotheylefttheirsmallflatforanold40-metre-high
PregnantWomenWarnedAboutACEInhibitorSomeofthemostcommonlyusedmedicinesforhighbloodpressurearedrugscalledACE
Over-the-counterdrugsarethemedicines______.Thenewrequirementsfortheactivechemicalsinamedicinemustbelabelled_
Over-the-counterdrugsarethemedicines______.Howmanykindsofover-the-counterdrugsaresoldintheUnitedStates?
随机试题
判断小儿体格发育最常用的指标是
对产品实现的要求中,以顾客的要求为基础,组织对产品提出要求中不包括哪项
下列哪项不属于脊柱的生理弯曲
按编的目的分类,施工组织设计的类型有()。
根据《注册建造师执业工程规模标准(试行)》,工程规模为()的防洪工程,其执业工程规模为中型。
图为色盲遗传系谱图,4号和6号表示男性患者,则3号是杂合子的概率为()
A.Itlookslikethisdownturnisinforthelonghaul.B.Skilledworkersmightnotbespared.C.Ifyouweregoingtoretiresoon
雨果作品较突出的思想和艺术特征有_______。
改革、发展、稳定好比现代化建设棋盘上的三着紧密关联的战略性棋子,每一着棋都下好了,相互促进,就会全局皆活;如果有一着下不好,其他两着也会陷入困境,就可能全局受挫。改革开放以来,党在处理改革、发展、稳定关系方面积累的经验和主要原则包括
CounselingTeamandtheServices1.Counselingteam-NaomiFlynna.Targeting:Thosewhohaveneverusedacounselorbefore
最新回复
(
0
)