首页
登录
职称英语
Every living thing has what scientists call a biological clock that controls
Every living thing has what scientists call a biological clock that controls
游客
2024-05-28
22
管理
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 can 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 biologicaI 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】______ call 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】______ . [br] 【C11】
选项
A、And
B、So
C、Then
D、But
答案
D
解析
连接词辨析题。由上题我们知道了空格前后两句话是转折关系:当迁徙时间已到,而又被阻止不能迁徙的鸟类很不平静.而当鸟类迁徙结束后它们又恢复了平静,故D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3609936.html
相关试题推荐
Thescientistshaveworkedout______.(一种可以大规模提高农业生产的方法)amethodbywhichthe
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themaking
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themaking
Scientistssaytheyhavehighhopesforadrugthatcouldonedayprovidean
Scientistssaytheyhavehighhopesforadrugthatcouldonedayprovidean
[originaltext]M:Youlikelivinginthecity,don’tyou?W:Oh,Iloveit.It’s
[originaltext]M:Youlikelivinginthecity,don’tyou?W:Oh,Iloveit.It’s
[originaltext]Scientistssaysharkshavelivedintheworld’soceansformi
[originaltext]Scientistssaysharkshavelivedintheworld’soceansformi
ClimateChangeScientistspredictincreasi
随机试题
Violinprodigies(神童),Ilearned,havecomeindistinctwavesfromdistinctr
I’m______theimpressionthatyou’vetoldmeaboutit.A、onB、ofC、underD、intoC固
设总体X服从分布N(0,2^2),而X1,X2,…,X15是来自总体X的简单随机
B【考情点拨】本题考查了定积分的换元积分法的知识点.
以下不是设计覆盖义齿暴露牙周基托的设计原则的是A.尽可能少覆盖龈边缘 B.以金
下列关于金融机构职能的表述,正确的有()。A.根据原银监会2009年8月印
2020年12月,中国新能源汽车生产销售双增长,产销双双超过20万辆,再创历史新
在太阳系的八大行星中木星的“左邻右舍”是( )A.水星和金星 B.火星和
理财产品销售管理、理财投资运作管理是商业银行理财产品信息披露管理的内容。
宁波新达电报有限公司(3302940141)于2009年4月24日进口一批用于生
最新回复
(
0
)