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 Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock__
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock__
admin
2009-06-15
30
问题
A Special Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock______(51)plants when to form flowers and when the flowers should open. It tells insects when to______(52)the protective cocoon(防护卵袋)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 because of the______(54)of hours of daylight. In the short______(55)of winter, its fur becomes white. The fur becomes gray brown in______(56)in the longer hours of daylight in summer.
Inner signals control other______(57)clocks. German scientists found that some kind of internal clock seems’ to order birds to begin their long migration ______(58)twice each year. Birds______(59)from flying become restless when it is time for the trip,______(60)they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which______(61)of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain______(62)to control the timing of some of our actions. These______(63)tell a person when to wake, when to______(64)and when to seek food. Scientists say there probably are other biological clock Cells that ______(65)other body activities.
选项
A、functions
B、places
C、cells
D、actions
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/A5md777K
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
Youwillhearfivepeoplegivingtheiropinionsonspankingchildren.Forquestions9-13,choosefromthelistA-Fwhateac
Listentothefollowingdescriptionoffivepeopleanddecidewhatkindofpersoneachis.Forquestions9~13,choosethewo
Lookatthequestionsforthispart.Youwillhearapassageabout"Migrationinthe19thCentury".Youwilllistentoitt
CONVERSATION2(Questions5-8)Fred’sjob:【L5】______driver.Yearsfordoingthejob:【L6】______.ProblemsFredhad:troublewith
OnhisTVprogramme,Stevelikestoshowaudiences
Youseethefollowingnoticeinaninternationalmagazine.COMPETITIONIsitbettertol
Lindawantstochangeacassettebecauseshedislikesit.LindahasalreadyseentheIrishband.
WhatcanweinferfromthefiguresabouttheAmericanhouseholdsizeinthefirstparagraph?Accordingtotheauthor,themost
WhichofthefollowingstatementsisNOTtrue,accordingtothepassage?Asupermarketusuallyhas______.
Therecyclingofaluminumconservesninety-fivepercentoftheenergyneededtomakenewmetal.
随机试题
在酸液伤害模拟评定试验中,当K1<K0时,表示酸液对岩心有伤害。()
主张利用私营部门的管理理念来重塑政府的行政发展模式是()
下列骨骼不参与眼眶的构成的是
某地发生一起以爆炸手段故意杀人致多人伤亡的案件。公安机关立案侦查后,王某被确定为犯罪嫌疑人。关于本案辨认,下列哪一选项是正确的?
安全出口标志灯和疏散标志灯的安装高度分别以下列何者为宜?Ⅰ.安全出口标志灯宜设在距地高度不低于1.5m处;Ⅱ.安全出口标志灯宜设在距地高度不低于2.0m处;Ⅲ.疏散标志灯宜设在离地面1.5m以下的墙面上;Ⅳ.疏散标志灯宜设在离地面1.0m以下的墙面
某医院门诊楼,位于市中心区域,建筑面积28326m2,地下1层,地上10层,檐高33.7m。框架剪力墙结构,筏板基础,基础埋深7.8m,底板厚度1100mm,混凝土强度等级C30,抗渗等级P8。室内地面铺设实木地板,工程精装修交工。2008年3月15日开工
财政是伴随着()的产生而产生的。
社会工作者小吕最近被机构安排到居家养老服务项目中,负责人户探访体弱老人的工作。小吕的督导老蔡有十余年服务老人的经验,在一次督导会谈中示范了接触体弱老人的技巧,包括不时轻轻接触老人的手和肩膀,表达肯定和关怀;说话时语速要慢,语调平缓,句子简单直接;发问时只提
1945年日本战败投降后,依据哪两个文件规定,钓鱼岛应作为台湾附属岛屿归还中国?()
如果在橙子开花季节持续干旱,橙子产量将会受到影响,今年某地在橙子开花季节出现旱情,因此有人担心橙子价格会上涨,从而使得该地橙汁饮料厂的生产成本提高。 以下最能削弱上述论证的一项是()。
最新回复
(
0
)