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
2024-06-01
25
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] 【C6】
选项
A、night
B、daylight
C、light
D、day
答案
B
解析
语意判断 。在上下文中我们得知,the fur becomes gray-brown in longer (68) of daylight in summer.(皮毛在夏天长时间日光照射下会变成棕灰色。)可以判断应该是日光照射的小时数影响了该动物皮毛颜色的变化。daylight表示“日光”,所以B项正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3614353.html
相关试题推荐
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowinganasp
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowinganasp
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowinganasp
[audioFiles]audio_eusm_0109(20106)[/audioFiles]A、Fireprevent.B、Pestcontrol.
Tounderstandtheimportanceofcontrolledobservationinpsychology,weloo
Tounderstandtheimportanceofcontrolledobservationinpsychology,weloo
Tounderstandtheimportanceofcontrolledobservationinpsychology,weloo
Tounderstandtheimportanceofcontrolledobservationinpsychology,weloo
BiologicalMimicryTheInventionofVelcro
BiologicalMimicryTheInventionofVelcro
随机试题
Theage-oldriddleofwhymanywomenoutlivemenhasbeensolved.It’stheir
We’veproduced______cottonthisyearaswedidin2002.A、asmuchtwiceB、much
重要值是用来表示某个种在群落中地位和作用的综合数量指标。()
初产妇,孕32周,自觉头晕、乏力及食欲差半个月。查体:胎位、胎心及骨盆外测量均正
A.绝对卧床休息 B.注意尿颜色的变化 C.两者均非 D.两者均是肾实质手
进行施工成本控制中的人工费控制,主要控制的是()。A、用工数量 B、用工定额
下列关于生态系统的表述,哪项是错误的?()A.包括特定地段中的全部生物和物理
(2017年真题)企业通过期货市场销售和采购现货得到的最大的好处包括()。
(2019年真题)认为利息是人们在特定时期内放弃货币周转的灵活性的报酬,这是(
男,41岁。刀刺伤右上腹1小时来诊,腹腔穿刺抽出不凝血,急诊手术探查。正确的腹腔
最新回复
(
0
)