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
2023-08-28
73
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 the 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 Siberain 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 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 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. It can【C16】______many days for a human body to【C17】______the 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] 【C14】
选项
A、how
B、why
C、where
D、when
答案
A
解析
结构衔接题。空后的句子they affect the way we do our work作studying的宾语,故本空应填一引导词引导宾语从句。下文提到经常更换工作时间就会导致我们的身体不适应,这正是生物钟影响我们身体工作的方式,[A]how表方式,符合语义和语法结构,故答案为[A]。
转载请注明原文地址:http://tihaiku.com/zcyy/2965501.html
相关试题推荐
[originaltext]W:Whatdoyoudoforaliving,Frank?M:Iamanaerospaceengin
[originaltext]W:Whatdoyoudoforaliving,Frank?M:Iamanaerospaceengin
[originaltext]Onewaythatscientistslearnaboutmanisbyanimals,sucha
Amusselgripsahardsurfaceveryfirmlyto______.[br]Scientistsarenotthi
Before1965manyscientistspicturedthecirculationoftheocean’swaterm
Before1965manyscientistspicturedthecirculationoftheocean’swaterm
[originaltext]Livingthingstakefromtheirenvironmentandgivebacktoth
[originaltext]Livingthingstakefromtheirenvironmentandgivebacktoth
Scientistsbelievethat___________________(用脑越多,思维就越活跃).themoreweuseourb
[originaltext]Scientistssaysharkshavelivedintheworld’soceansformi
随机试题
TheSeattleTimesCompanyisonenewspaperfirmthathasrecognizedthenee
Thecommandersfoundthemselvesfarfromreadytofightthewar.A、指挥官们发现早就做好了战
NotSeeingtheForestfortheDollarBillsA)TheU.S.Fisha
[originaltext] Cambodia’sGrade12studentstooktheirfinaltestinAugustla
Whatisthislecturemainlyabout?[br]Whydoestheprofessordescribetheproc
A.tragedyB.actuallyC.preparedD.informE.visibleF.remindG.mea
______isknowntotheworld,MarkTwainisagreatAmericanwriter.A、ThatB、Whic
运维班班长、副班长和专业工程师应每(____)至少参加(____)次巡视,监督、
对搜索引擎的描述错误的是( )A.搜索英文资料,Google较为合适 B.搜
下列何药对脑血管有选择性扩张作用() A.nifedipine(硝苯地平)
最新回复
(
0
)