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
40
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.
What is Mr. Weitzman’s ultimate purpose of establishing a laboratory?
选项
A、He wanted to have his experiment report published in the newspapers.
B、People are free to listen to and live by their circadian rhythms.
C、He wanted to find a way to treat people’s diseases.
D、He could gain some reputation for the first scientific observation of circadian.
答案
C
解析
细节题。第二段第十句话说“Dr.Weitzman hopes his research will lead to effective treatments forcommon sleep problems and sleep disorders caused by aging and mental illness.”这与C符合。
转载请注明原文地址:https://jikaoti.com/ti/w16YFFFM
0
考博英语
相关试题推荐
Itishardtopredicthowscienceisgoingtoturnout,andifitisreallygoodscienceitisimpossibletopredict.Ifthethi
"BACKtobusinessasusual"wastherallyingcrytakenupbyNewYorkersayearago,afterterroristsdestroyedtheWorldTrade
Change—ortheabilitytoadaptoneselftoachangingenvironment—isessentialtoevolution.Thefarmerwhoselandisrequiredfo
Mostparentsprizethediversitywithintheirchildren’spublicschools.Theyknowthatlearningtocooperateandexcelinadiv
ManyAmericansharboragrosslydistortedandexaggeratedviewofmostoftheriskssurroundingfood.FergusClydesdale,headof
AccordingtoScottAdams,creatorofthecomicstrip(系列漫画)Dilbert,theannualperformancereviewis"oneofthemostfrightening
Architectsarehopelesswhenitcomestodecidingwhetherthepublicwillviewtheirdesignsasmarvelsormonstrosities,accord
ComedianGeorgeCarlinhasaroutineinwhichhetalksabouthowhumansseemtospendtheirlivesaccumulating"stuff"Oncethey
Intheeighteenthcentury,Japan’sfeudaloverlords,fromtheshoguntothehumblestsamurai,foundthemselvesunderfinancials
Allcultureshavesomesystemofmeasuringduration,orkeepingtime,butinwesternindustrializedsocieties,wekeeptrackof
随机试题
关于基金公司的股东行为,下列说法错误的是()。
"Whatdidtheteachersaytoyoujustnow?""Sheaskedme______."
根据症状及检查,最可能的诊断是:最合适的证型是:
图7-43所示电路中,,变压器视为理想的,,R2=R1,则输出电压与输入电压的有效值之比为()。
根据《环境空气质量标准》,以下属于环境空气质量一类区的是()。
某市环保局、卫生局与水利局在联合执法过程中,发现某化工厂排污口布局不合理,可能污染周围环境,遂联合作出决定,责令其限期拆除违规设置的排污管道,并罚款2万元。化工厂对处罚决定不服,准备起诉。根据行政诉讼法,下列说法正确的是()。
2×17年9月2日,甲公司取得当地财政部门拨款2000万元,用于资助甲公司2×17年9月开始进行的一项研发项目的前期研究。预计将发生研究支出5000万元。项目自2×17年9月开始启动,至年末累计发生研究支出1000万元。取得时已满足政府补助所附条件,甲公司
一般从业人员执行操作规程,具体要求包括()。
[2014年1月]已知二次函数f(x)=ax2+bx+c,则能确定a,b,c的值。(1)曲线y=f(x)经过点(0,0)和点(1,1);(2)曲线y=f(x)与直线y=a+b相切。
Scatteredaroundtheglobearemorethan100smallregionsofisolatedvolcanicactivityknowntogeologistsashotspots.Unlik
最新回复
(
0
)