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
58
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】______ .
【C10】
选项
A、ruthless
B、annoyed
C、restless
D、anxious
答案
C
解析
形容词辨义 。通过下文我们得知,they become calm again when the time of the flight has ended当鸟类迁徙结束后,它们又恢复了平静。因此可以判断,当迁徙时间已到,而又被阻止不能迁徙的鸟类应有的状态是“不平静的”(calm的反义词)。restless表示“不平静的,不安宁的”,所以选择C项。
转载请注明原文地址:https://kaotiyun.com/show/hrz7777K
0
大学英语六级
相关试题推荐
Althoughthefactthattodayvirusesareknownto【S1】______causecancerinanimalsandincertainplants,tha
Althoughthefactthattodayvirusesareknownto【S1】______causecancerinanimalsandincertainplants,tha
Althoughthefactthattodayvirusesareknownto【S1】______causecancerinanimalsandincertainplants,tha
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
随机试题
下列正确的说法是
根据《中华人民共和国公司法》的规定,公司合并时,应在法定期限内通知债权人,该法定期限为()。
对于非点源,正常设计条件下河流稀释混合模型为()。
根据《生态文明体制改革总体方案》,关于环境信息公开制度的说法,错误的是()。
招标人和中标人应当在中标通知书发出之日起()日内,根据招标文件和中标人的投标文件订立书面合同。
特许权使用费所得包括()。
正保集团拥有甲上市公司80%的有表决权股份。甲公司是一家从事石油化工生产的公司,注册地为广州。为优化企业的产业结构、提高企业的核心竞争力,2008年甲公司进行了以下资本运作和机构调整。甲公司2008年发生的相关事项如下:2008年7月3日,甲公司以银行存
_________是苏联作曲家普罗科菲耶夫为儿童写的带有故事朗诵的交响童话。
下列关于饮食健康的说法,错误的是:
用8位二进制数能表示的最大的无符号整数等于十进制整数()。
最新回复
(
0
)