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
Why did people make gardens into "flower clock"?
Why did people make gardens into "flower clock"?
admin
2012-01-21
24
问题
Why did people make gardens into "flower clock"?
It was long ago noticed that different plants open and close at different times of the day. In fact, in the nineteenth century they used to make gardens in the shape of a clock face, with different flowers opening at different times. It was possible to tell the time just by looking at this "flower clock". No one really understands why flowers open and close like this at particular times, but recently some interesting experiments have been done. Once, flowers were put in a laboratory in constant darkness. One might predict that these flowers, not having any information about the time of day, would not open as they usually do. But in fact they continue to open as if they were in a normal garden. This suggests that they have some mysterious way of keeping time; that they have, in other words, a kind of "biological clock".
It has recently been found that not just flowers, but all living things (including man)have "cycles of activity". Because these cycles last about twenty-four hours, they are called "circadian cycles" (circa = about, diem = day). Some scientists believe these cycles are controlled by an "internal clock". According to this theory, the flowers in the laboratory open because their "internal clock" tells them to do so.
There are other scientists, including the American Dr Brown, who believe that the biological clock is controlled by the environment. He studied the way oysters open and close their shells at high and low tide. He took some oysters from the sea to his laboratory a thousand miles away in Illinois. According to the "internal clock" theory one would expect the oysters to open and close as they had done before. But in fact their cycle changed. Brown and his colleagues could not understand this until they asked themselves the question: "If Illinois were on the sea, when would high and low tides take place?" He found that the oysters were opening and closing at exactly these times. Brown concluded that the oysters’ cycle was controlled by changes in the atmosphere — changes that, in places where there is a sea, are associated with the tides.
选项
A、To make gardens into a round shape.
B、To look at the flower in the gardens at different times of the year.
C、To attract people.
D、To know the time.
答案
D
解析
本题为推断题。从“It was possible to tell the time just by looking at this ’flower clock’”可推测出目的是判断时间。因此答案选D。
转载请注明原文地址:https://kaotiyun.com/show/hUXd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
WhySoManyChildren?InmanyofthedevelopingcountriesinAfricaandAsia,thepopulationisgrowingfast.Thereasonfor
Obesity(肥胖)CausesGlobalWarmingThelistofillsattributabletoobesitykeepsgrowing:Lastweek,obesepeoplewereaccuse
ManofFewWordsEveryonechasessuccess,butnotallofuswanttobefamous.SouthAfricanwriterJohnMaxwellCoetzee
HowtoGetAlongWellWithYourBoss1Beforeyouarguewithyourboss,checkwiththeboss’ssecretarytodeterminehismo
Ifso,thenextcensusin2021couldshowthebeginningofashifttowardsnormality.
USBlacksHard-hitbyCancerDeathratesforcancerarefallingforallAmericans,butblackAmericansarestillmorelikely
WhySoManyChildrenInmanyofthedevelopingcountriesinAfricaandAsia,thepopulationisgrowingfast.Thereasonfort
Whatisthemainideaofthethirdparagraph?WhichoneofthefollowingisNOTmentionedinthepassageaboutthenewapproach
ProfessorWangwentonalecturetourtoEdinburgh.
随机试题
在报火警时,应当精简清晰地说明火灾发生情况和火灾信息,其中不包含的是()。
()是指由梁和柱以刚接或铰接相连接成承重体系的房屋建筑结构。
随着孩子的长大,他们往往能比成年人更快地接受新的社会信息,会把他们的文化传递给自己的父辈,社会学学者把这一影响作用称为___________。
税收收入的来源;即各种税收收入的最终出处,称为()
何谓目标监测?
在我国上消化道出血最常见的病因是
头围是指自眉弓上方最突出处,经枕后结节绕头的周长。()
()队成为首支进入亚冠足球联赛决赛的中超球队。
社会体育,是由企业、事业单位职工,国家机关工作人员,以及城镇或农村居民等不同的群体,为达到健身、健心、健美、娱乐、医疗等目的而进行的内容丰富、形式多样的身体锻炼活动。根据上述定义,以下哪项活动不是社会体育活动?
以下民事法律关系中属于物权法律关系的是()。
最新回复
(
0
)