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
41
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] 【C15】
选项
A、can
B、must
C、might
D、may
答案
B
解析
语义衔接题。人们更换工作时间一般是迫不得已而为之,只有[B]must有这层含义,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2965502.html
相关试题推荐
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themaking
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themaking
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themaking
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themaking
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themaking
[originaltext]Scientistshaveobservedthatplantsthemselvesproducemany
Twogroupsofscientistsdemonstratedlastweekforthefirsttimethatthe
Twogroupsofscientistsdemonstratedlastweekforthefirsttimethatthe
Twogroupsofscientistsdemonstratedlastweekforthefirsttimethatthe
Twogroupsofscientistsdemonstratedlastweekforthefirsttimethatthe
随机试题
4岁男孩,咳嗽5个月,凌晨及活动后加剧,服用多种抗生素无效,服用博利康尼(特布他
应由专业监理工程师组织施工单位项目专业技术负责人进行验收是()。A、分项工程
下列选项中,属于进度计划检查审核内容的有()。A、能否保证工程施工质量 B、
A.结核性脑膜炎B.肺结核C.骨关节结核D.结核性腹膜炎E.皮肤结核病长期低热,
A.阿卡波糖B.甲苯磺丁脲C.曲格列酮D.胰岛素E.苯乙双胍肝功能障碍的轻型糖尿
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
阶级斗争是推动阶级社会发展的直接动力,主要表现在两个方面,它们分别是 A
(2019年真题)下列关于期权价格的表述,正确的有()。A.看涨期权的价格
影响运输线路布局的要素有()。A:运输工具技术标准 B:运输线路走向 C:
分期围堰导流法包括()。A.明渠导流 B.已建或在建的永久建筑物导流
最新回复
(
0
)