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
2010-11-02
32
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 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 the 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.【C16】______ can 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】______ .
【C12】
选项
A、what
B、which
C、why
D、how many
答案
B
解析
语义衔接题。通过下文a small group of cells near the front of the brain seemed to control the (74) of some of our actions 可知,研究者们研究的是大脑哪些部位起作用,因此选择B。
转载请注明原文地址:https://kaotiyun.com/show/tLs7777K
0
大学英语六级
相关试题推荐
A、HeputfileinformationontopofhisdeskB、Hedoesn’tknowtheanswerrightnow.C、Thetopofhisheadhurts.D、He’snotsur
A、Shedoesn’twanttopaythelatefee.B、Shewasgivenincorrectinformation.C、Shecan’taffordtopayhertuition.D、Shedidn
PassageOneAliceWalkermakesherlivingbywriting,andherpoems,shortstories,andnovelshavewonmanyawardsandfell
A、Thegroupinamessystoreroom.B、Thegroupinaniceoffice.C、Thegroupinapoorlydesignedlivingroom.D、Alloftheabove
Agoodwaytogetinformationforessaysandreportsistointerviewpeoplewhoarcexpertsinyour【S1】______topicorwho
Agoodwaytogetinformationforessaysandreportsistointerviewpeoplewhoarcexpertsinyour【S1】______topicorwho
Infact,PeterwouldratherhaveleftforSanFrancisco______(而不愿呆在纽约).
Intheatmosphere,carbondioxideactsratherlikeaonewaymirror—theglassintheroofofagreenhousewhichallowsthesun’s
Intheatmosphere,carbondioxideactsratherlikeaonewaymirror—theglassintheroofofagreenhousewhichallowsthesun’s
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglassintheroofofagreenhousewhichallowsthesun’s
随机试题
改革开放40年取得了哪些成就?
固定桥粘固后不久,患者感到胀痛不适,主要见于
肺炎球菌的主要致病物质是
男,40岁。夜尿多、乏力1年。查体:血压160/105mmHg,血钠142mmol/L,血钾2.0mmol/L,尿钾350mmol/L。最可能的诊断是
前人认为肥人多
甲投资人同时买入一支股票的1份看涨期权和1份看跌期权,执行价格均为50元,到期日相同,看涨期权的价格为5元,看跌期权的价格为4元。如果不考虑期权费的时间价值,下列情形中能够给甲投资人带来净收益的有()。
根据以下资料,回答81-85题。国家统计局发布2010年1-4月份全国房地产市场运行情况:1-4月,全国完成房地产开发投资9932亿元,同比增长36.2%,其中,商品住宅完成投资6854亿元,同比增长34.0%,占房地产开发投资的比重为69.0%。
冠心病:传染病
期权交易如果只能在到期日当天执行,则称为()
WhatdidCompCodotoday?
最新回复
(
0
)