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
2010-10-28
99
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】______ .
【C20】
选项
A、product
B、production
C、productivity
D、producer
答案
B
解析
同根词辨析 。根据语意,这种对生物钟的了解有利于减少工作中突发的疾病和事故,并且有利于提高产量。因此production为正确选项。
转载请注明原文地址:https://kaotiyun.com/show/Erz7777K
0
大学英语六级
相关试题推荐
Althoughthefactthattodayvirusesareknownto【S1】______causecancerinanimalsandincertainplants,tha
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowinganaspirintabletoreatingachickensandwich--theycana
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowinganaspirintabletoreatingachickensandwich--theycana
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowinganaspirintabletoreatingachickensandwich--theycana
A、Sheknowsalargerapartmenthecanrent.B、Sheisusedtolivinginalargeapartment.C、Sheknowstheman’sneighborismovi
Weallscreamforwaterwhenthirsty,butdoyouknowinveryhot,dryweather,plantsalsomake【B1】______soundsasiftheya
Weallscreamforwaterwhenthirsty,butdoyouknowinveryhot,dryweather,plantsalsomake【B1】______soundsasiftheya
随机试题
企业从银行取得借款直接偿还应付购货款,属于()。
有机磷酸酯类中毒机理是:
可存放于相邻药斗中的药物是
不可用糖皮质激素治疗的疾病是
下列属于基础货币的有()。存款乘数与货币乘数非常相似,并可以相互推导,两者所不同的是()。
甲公司于2011年12月1日购入一项设备,取得成本为600万元,会计上采用年限平均法计提折旧,使用年限为10年,净残值为零,计税时按双倍余额递减法计提折旧,使用年限及净残值与会计相同。甲公司适用的所得税税率为25%。假定该企业不存在其他会计与税收处理的差异
根据信息加工过程理论,()对整个信息加工过程起调控作用,目的就是为了提高信息加工的效率。
某商品定价80元,预计可销售60件,若每降价1元,则预计可多销售3件,已知预计降价10%销售时所获得的利润同未降价销售时所获得的利润相同,则该商品的成本是()元。
N名学生的成绩已在主函数中放入一个带头节点的链表结构中,h指向链表的头节点。请编写函数fun,它的功能是:求出平均分,由函数值返回。例如,若学生的成绩是:85,76,69,85,91,72,64,87,则平均分应当是:78.625。注意
RenewableEnergy[A]Inthepastcentury,ithasbeenseenthattheconsumptionofnon-renewablesourcesofenergyhascausedmo
最新回复
(
0
)