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
31
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.
The sentence "They are free to listen to and live by their circadian rhythms. "(Para. 2)probably means_____.
选项
A、They can lead their daily lives according to their biological clocks, without referring to a manmade clock
B、They can listen to the wonderful rhythms of the biological clock and live close to them
C、They can live by regulating their own circadian rhythms
D、They are free from the annoying rhythms of everyday life
答案
A
解析
词义题。第二段第六句话说“They learned that man’s biological clock actually keeps time with aday of a little less than 25 hours instead of the 24 hours on a man—made clock.an American doctorestablished a laboratory to study how our biological clock works.The people in his experiments areshut off from the outside world.They are free to listen to and live by their circadian rhythms.”这说明,人类可以根据自身的生物钟活动,无需根据人造钟。这与A符合。
转载请注明原文地址:https://kaotiyun.com/show/gMQO777K
0
考博英语
相关试题推荐
Inthispart,youarerequiredtowriteanessayofnolessthan200wordsonPrivateSchoolsinChina.Theessayshouldbebase
Manyinstructorsbelievethataninformal,relaxedclassroomenvironmentis【C1】______tolearningandinnovation.Itisnotuncom
Manyinstructorsbelievethataninformal,relaxedclassroomenvironmentis【C1】______tolearningandinnovation.Itisnotuncom
AnumberofbookslikeReadingFacesandBodyLanguagehave【C1】______theindividual’stendencytobroadcastthingsthroughallm
ComedianGeorgeCarlinhasaroutineinwhichhetalksabouthowhumansseemtospendtheirlivesaccumulating"stuff"Oncethey
Yearsofresearchhadeducatedmeabouthowsugar,fat,andsaltchangethebrain.Iunderstoodsomeoftheparallelsbetweenhy
Topicsofconversationshouldbe______totheexperiencesandinterestsofthestudents.
Globalizationisaphenomenonthathasbeenaffectingcountriesandsocietiesforseveraldecades,buttheoutlineoftheglobal
Writeanessayofnolessthan200wordsonthetopicgivenbelow.UsetheproperspaceonyourAnswerSheetII.
Theitemscontainedintheparceldon’tcorrespond______thoseonthelistthataccompaniedit.
随机试题
能够激动骨骼肌上β2受体产生肌肉震颤的平喘药有
环保行政主管部门在收到申请环保设施竣工验收之日起到完成竣工验收,不应超过()。
属于工业产权的知识产权有()。
下列属于资本市场的是()。
纳西族人民集体创作了长篇史诗《______》,它是宝贵的历史文化遗产。
语言学习的随机渗透
人民警察的工作纪律要求人民警察在工作中务必积极履行公务,其内容包括()。
从E-R图导出关系模型时,如果两实体间的联系是m:n,下列说法中正确的______。
有以下程序#include<stdio.h>voidfunc(intn){staticintnum=1;num+=n;printf("%d",num);}main(){
在窗体有两个名为text0的文本框和一个名为Command1的命令按钮,事件过程如下:PrivateSubCommand1_Click()n=Val(InputBo:c("请输入n:"))x=1y=1
最新回复
(
0
)