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
42
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] 【C12】
选项
A、when
B、which
C、what
D、why
答案
B
解析
结构衔接题。结合下面提到的a small group of cells near the front of the brain seemed to control以及there are other cells to control可知,此处应该是说科学家正在研究大脑中的哪些部位起作用,故答案为[B]which。[C]what强调“是什么”,此处已经限定研究的对象位于大脑中,故排除[C]。
转载请注明原文地址:https://tihaiku.com/zcyy/2965499.html
相关试题推荐
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
随机试题
TheJapanesedoctorsfindoutthat______.[br]Theresearchfindingsbasedon_
百度在一直努力创新,通过大数据分析的优势帮助我们寻求未来技术解决方案,应对社会和环境问题。[br][audioFiles]2018m8x/audio_et
[originaltext]InSpring2008,thepolarbearwasplacedontheendangereds
[originaltext]W:Mywatchstoppedagain.AndIjustgotanewbattery.Thatmad
A.空肠弯曲菌肠炎 B.金黄色葡萄球菌肠炎 C.真菌性肠炎 D.致病性大肠
(2016年真题)参考国际证监会的基本原则,下列描述错误的是()。A.投资
瑕疵履行是指单纯造成履行利益受损害的()行为。A:不完全履行B:拒绝履行C
关于利率期限结构的理论,下列说法不正确的是()。 A.市场预期理论认为期限结
爆炸性环境中,在采用非防爆型设备作隔墙机械传动时,下列哪项描述不符合规范的规定?
关于地震震级和烈度的说法,正确的是()。A:建筑抗震设计的依据是国际通用震级划分
最新回复
(
0
)