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
2023-09-08
37
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
名词辨析题。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:https://tihaiku.com/zcyy/2995897.html
相关试题推荐
PassageOneAliceWalkermakesherlivingbywriting,andherpoems,sho
PassageOneAliceWalkermakesherlivingbywriting,andherpoems,sho
PassageOneAliceWalkermakesherlivingbywriting,andherpoems,sho
PassageOneAliceWalkermakesherlivingbywriting,andherpoems,sho
PassageOneAliceWalkermakesherlivingbywriting,andherpoems,sho
PassageOneAliceWalkermakesherlivingbywriting,andherpoems,sho
Noiseentersourearsaspowerfulwavesofmechanicalenergy.Scientistsmea
______(即使计算是正确的),scientistscanneverbesurethattheyhaveincludedallvar
[originaltext]ThelivingconditionsforthepoorandforimmigrantsinNew
Scientistsestimate______(还要过很多年这种药才能用在人身上).itwillbemanyyearsbeforethe
随机试题
You’dratherworkthanplay,______?A、doyouB、wouldyouC、don’tyouD、wouldn’t
AtatimewhenatoweringpersonalitylikeMme.Curiehascometotheendof
AMessontheLadderofSuccessA)ThroughoutAmericanhistor
某患者,二尖瓣面容,呼吸困难;心电图示"二尖瓣型P波";X线检查心影呈梨形;超声
(2011年真题)下列会计核算的基本前提,作为会计核算记账基础产生的前提是( )
有关热原检查法的叙述中,错误的是A鲎试剂法对革兰阴性菌以外内毒素不灵敏 B鲎试
轴向受拉压杆横截面积为A,受荷载如图所示,则m-m截面上的正应力为:
当甲、乙、丙类液体槽车装卸栈台设置泡沫炮或泡沫枪系统时,下列说法错误的是()。
道路运输行政诉讼的特殊性表现在()。A.道路运政管理的相对人较为集中,多为道路运
斜坡堤堤心石抛填,当采用陆上推进法时,堤根的浅水区可一次抛填到顶,堤身和堤头视(
最新回复
(
0
)