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
62
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] 【C12】
选项
A、what
B、which
C、why
D、how many
答案
B
解析
考查疑问词 。通过下文a small group of cells near the front of the brain seemed to control the (73) of some of our actions可知,研究者们研究的是大脑哪些部位起作用,因此选择B项。
转载请注明原文地址:https://tihaiku.com/zcyy/2998093.html
相关试题推荐
Tounderstandtheimportanceofcontrolledobservationinpsychology,welo
Thescientistshavediscoveredthat___________________(这种物质的反应速度是那种物质的3倍).thi
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowingana
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowingana
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowingana
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowingana
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowingana
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowingana
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowingana
Scientistswillhaveto______(提出增加世界粮食供应的新方法).comeupwithnewmethodsofinc
随机试题
builtfortrainstorunon[br]providesomethingCsupply意为“供给,提供”,providingsom
Now,thesecondcharacteristicofactivelearnersistoreflectoninformati
[originaltext]W:Well,Mr.Smith,I’velookedintoyourinvoiceandfoundoutw
校对题:通读并纠正校样中的错误(本题20分)
①-⑤轴范围内应增设的室内消火栓数量最少是()个。 A.1
肺吸虫的第一中间宿主是A.钉螺 B.川卷螺 C.豆螺 D.扁卷螺 E.椎
以下属于财政政策的是()。A.转移支付制度 B.调节国民收入中消费与储蓄的比
病人腹痛窘迫,时时欲便,肛门重坠,大便出不爽,称为A.便秘B.泄泻C.里急后重D
患者,女性,29岁,大面积烧伤7小时,转送途中输液1000ml。入院后监测CVP
根据岩层条件,钻孔中较适宜的钻头型式是()。A.完整性较好的砂岩和破碎带中钻孔都
最新回复
(
0
)