首页
登录
职称英语
Every living thing has what scientists call a biological clock that control
Every living thing has what scientists call a biological clock that control
游客
2023-09-09
63
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 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】______ . [br] 【C5】
选项
A、skin
B、feather
C、peel
D、fur
答案
D
解析
名词辨义 。通过上下文判断,是动物的皮毛发生了变色。fur表示“皮毛,兽皮”。
转载请注明原文地址:http://tihaiku.com/zcyy/2998086.html
相关试题推荐
[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
[originaltext]Scientistssaysharkshavelivedintheworld’soceansformi
[originaltext]Scientistssaysharkshavelivedintheworld’soceansformi
ClimateChangeScientistspredictincreasi
ClimateChangeScientistspredictincreasi
ClimateChangeScientistspredictincreasi
ClimateChangeScientistspredictincreasi
随机试题
Pollutionhasbecomeaseriousprobleminalmostallthebigcitiesofthew
Anyonewhoseesaspecialtypeofairplanewithitsturningwingsknowsiti
CanTonyBlairSavetheWorldofBooks?Atthebeginning
按照制图标准要求,下列说法中正确的是( )。A.总图中的坐标、标高、距离宜以米
《素问·脉要精微论》所说"泛泛乎万物有余"的脉象,其相应的时间是()A.长
简述如何根据迁移的知识合理处理教学程序。
下列做法中,可能导致被审计单位虚增本期主营业务收入的有:A、将委托他人代销商品作
中华人民共和国房地产经纪人协理从业资格证书、中华人民共和国房地产经纪人协理注册证
A.12 B.7 C.2 D.0
将学习材料分解为许多小步子,并按系统排列起来,每一步都要提出问题,让学生作出回答
最新回复
(
0
)