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 an inner biological clock that controls behavior. The clock works all the time even when there are no out
Every living thing has an inner biological clock that controls behavior. The clock works all the time even when there are no out
admin
2015-01-09
67
问题
Every living thing has an inner biological clock that controls behavior. The clock works all the time even when there are no outside signs to mark the passing of time. The biological clock tells plants when to form flowers and when the flowers should open. It tells insect when to leave the protective cocoon and fly away. And it tells animals when to eat,sleep and wake. It controls body temperature,the release of some hormones and even dreams. These natural daily events are circadian rhythms.
Man has known about them for thousands of years. But the first scientific observation of circadian rhythms was not made until 1729. In that year French astronomer,Jean-Jacquesd"Ortous de Mairan",noted that one of his plants opened its leaves at the same time every morning,and closed them at the same time every night. The plant did this even when he kept it in a dark place all the time. Later scientists wondered about circadian rhythms in humans. They learned that man’s biological clock actually keeps time with a day of a little less than 25 hours instead of the 24 hours on a man-made clock. About four years a-go an American doctor,Eliot Weitzman,established a laboratory to study how our biological clock works. The people in his experiments are shut off from the outside world. They are free to listen to and live by their circadian rhythms. Dr. Weitzman hopes his research will lead to effective treatments for common sleep problems and sleep disorders caused by aging and mental illness. The laboratory is in the Monte-flore Hospital in New York City. It has two living areas with three small rooms in each. The windows are covered,so no sunlight or moonlight comes in. There are no radios or television receivers. There is a control room between the living areas. It contains computers,one-way cameras and other electronic devices for observing the person in the living area. The instruments measure heartbeat,body temperature,hormones in the blood,other substances in the urine and brain waves during sleep. A doctor or medical technician is on duty in the control room 24 hours a day during an experiment. They do not work the same time each day and are not permitted to wear watches,so the person in the laboratory has no idea what time it is. In the first four years of research,Dr. Weitzman and his assistant have observed 16 men between the ages of 21 and 80. The men remained in the laboratory for as long as six months. Last month,a science reporter for The New York Times newspaper,Dava Sobol,became the first woman to take part in the experiment. She entered the laboratory on June 13th and stayed for 25 days. Miss Sobol wrote reports about the experiment during that time, which were published in the newspaper.
Miss Sobol left the laboratory____.
选项
A、on June 13th
B、on June 25th
C、at the end of June
D、on July 7th
答案
D
解析
细节题。第二段倒数第二句话说“She entered the laboratory on June 13th and stayed for 25days.”这说明她离开的时间应该是7月7日。这与D符合。
转载请注明原文地址:https://kaotiyun.com/show/wMQO777K
0
考博英语
相关试题推荐
Allcultureshavesomesystemofmeasuringduration,orkeepingtime,butinwesternindustrializedsocieties,wekeeptrackof
Mathematicalabilityandmusicalabilitymaynotseemonthesurfacetobeconnected,butpeoplewhohaveresearchedthesubject
Classroomtesting,ifwelldone,mostcertainly______astimulustostudyandreallearning.
Manyamythhasgrownuparoundthebrain’sasymmetry(不对称现象).【T1】Theleftcerebralhemisphereissupposedtobethecoldlylogic
Businessandgovernmentleadersconsidertheinflationratetobeanimportantgeneralindicator.Inflationisaperiodofincre
ThefamiliarsoundsofanearlyEnglishsummerarewithusonceagain.MillionsofchildrensitdowntoSATs,GCSEs,AS-levels,
Whenwecreditthesuccessfulpeoplewithintelligence,physicalstrengthorgoodluckwearemakingexcusesforourselvesbecau
OnereasonforthesuccessesofAsianimmigrantsintheU.S.isthattheyhavetakengreat______toeducatetheirchildren.
Theapartmentwas______at$20,000anditsownerwashappyaboutthat.
Thereiswidespreadbeliefthattheemergenceofgiantindustrieshasbeenaccompaniedbyanequivalentsurgeinindustrialrese
随机试题
肝功能不全
CAN系统由哪些模块组成?
简述派生诉讼的行使要件。
简述组织摩擦的种类。
党在过渡时期总路线的核心内容是“一化三改”,其中“一化”是指【】
初期复苏最快速、最简捷有效的人工呼吸方法是()
突触间的传递是双向的。()
投资项目社会评价指标应根据项目的具体情况选取,但无论采用何种指标,这些指标都具有一些共同的特征,即能反映()
在用户接入网中,()技术采用了回波抵消和自适应均衡技术延长基群信号传输距离。系统具有较强的抗干扰能力,对用户线路的质量差异有较强的适应性。
当x→0时,下列四个无穷小中,哪一个是比其他三个高阶的无穷小?()
最新回复
(
0
)