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
2024-05-30
7
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] 【C11】
选项
A、And
B、So
C、Then
D、But
答案
D
解析
连接词辨析题。由上题我们知道了空格前后两句话是转折关系:当迁徙时间已到,而又被阻止不能迁徙的鸟类很不平静,而当鸟类迁徙结束后它们又恢复了平静。故D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3612169.html
相关试题推荐
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrol
随机试题
[originaltext]Goodmorning,class.Mytopictodayishowtofeedahungryw
Mostpeoplewishtheyhadbettermemoriesandworryaboutforgettingthings
独舞《飞天》编导杨丽萍从孔雀的基本形象入手,创造一个精灵般的、高洁的生命意象。(
A.茵陈蒿汤 B.血府逐瘀汤 C.膈下逐瘀汤 D.茵陈四苓散 E.羚角钩
下列有关公积金的说法,错误的是()。A.公司的公积金可以用于扩大公司生产经
变压器出现假油位可能是由以下原因引起的()。油标管堵塞;呼吸器堵塞;变压器高压套
A.5.5A B.2.5A C.0A D.3.25A
初中阶段课程设置()相结合的课程。
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
共用题干 一般资料:求助者,男,24岁,某部士官,班长。案例介绍:求助者自述在
最新回复
(
0
)