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】______ flower
Every living thing has what scientists call a biological clock that controls behavior. It tells plants when to 【C1】______ flower
admin
2010-12-04
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 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】______ .
【C14】
选项
A、why
B、how
C、when
D、where
答案
B
解析
疑问副词辨析题。根据下文可知.如果我们经常更换工作时间,我们的身体会不适应。这正是生物钟影响我们工作的体现,所以B正确。
转载请注明原文地址:https://kaotiyun.com/show/3es7777K
0
大学英语六级
相关试题推荐
A、Shewillstayhome.B、ShewillgotheconcertwithAbruzzi.C、ShewillinviteAbruzzitoaconcert.D、Shehasnotdecidedyet.
A、Peopledon’tunderstandtheimportanceoflearningtolisten.B、Sometimesweshouldlistenmorethanwespeak.C、Listeningis
A、Theyareattendingaconcert.B、Theyarenegotiatingaboutaprice.C、Theyareplanningtogoforadate.D、Theyarebuyingso
Theageofgildedyouthisover.Today’sunder-thirtiesarethefirstgenerationforacenturywhocanexpectalowerlivingsta
A、Bemuseoftheincreaseofeconomy.B、Bemusetheschoolshavetobuildmorebuildingsl.C、Mainlybecausetheexpenditureonedu
OneofLondonZoo’srecentadvertisementscausedmesomeirritation,sopatentlydiditdistortreality.Headlined"Withoutzoos
Scholarsandstudentshavealwaysbeengreattravelers.Theofficialeasefor"academicmobility"isnowoftenstatedinimpress
Scholarsandstudentshavealwaysbeengreattravelers.Theofficialeasefor"academicmobility"isnowoftenstatedinimpress
Takingyourdogonvacationmayhavebeen【B1】______adecadeago,buttodayit’sflee.【B2】______thepet-friendlyhotel,whe
Negotiating—acomplexprocessevenbetweenpartiesfromthesamenation—isevenmorecomplicatedininternationaltransactions
随机试题
A.IgGB.IgMC.IgAD.IgDE.IgE可以旁路途径激活补体,并参与黏膜局部免疫的抗体是
A.结缔组织病B.支气管肺炎C.肺炎链球菌肺炎D.布氏杆菌病E.急性白血病发热伴皮肤黏膜出血多见于
下列选项中,不属于艾滋病口腔表征的是
在电力系统分析和计算中,功率、电压和阻抗一般分别是指()。
加强党内监督意义重大,对此表述有误的是()。
根据《中华人民共和国立法法》的规定,基层群众自治制度属于地方性法规可以规定的事项。()
一位贫穷的农民喜欢这样教导他的孩子们:“在这个世界上,你不是富就是穷,你不是诚实就是不诚实。由于所有贫穷的农民都是诚实的,所以,每个富裕的农民都是不诚实的。”上述论证以哪项为假设,这位农民的结论能合乎逻辑地推导出来?()
已知四元齐次线性方程组(i)的解全是四元方程(ii)x1+x2+x3=0的解。求a的值;
WhatadvicedodoctorsgiveaboutvitaminC?DoctorsrecommendvitaminCto______.Whendothedoctorssuggestyoushould
Nowadays,somethinghasgoneterriblywrongwithouronce-proudAmericanwayoflife.Ithashappenedintheareaof【C1】______A
最新回复
(
0
)