首页
登录
职称英语
[originaltext] At present, human beings have used many devices to measure ti
[originaltext] At present, human beings have used many devices to measure ti
游客
2024-05-09
14
管理
问题
At present, human beings have used many devices to measure time. Perhaps, the sundial was, one of the earliest and simplest devices. A sundial can measure the movement of the sun across the sky each day.
The sundial worked very well only when the sun was shining. So other ways of measuring the passing of time were invented at that time. One device was the hourglass. It used a thin stream of falling sand to measure time.
By the 1700s, people had already developed mechanical clocks and watches. And today many of our clocks and watches are electronic.
So we have devices to mark the passing of time. But what time is it now? Clocks in different parts of the world do not show the same time at the same time. As international communications and travel grew, it became clear we need a way to establish a common time for all parts of the world.
In 1884, an international conference divided the world into 24 time areas or zones. Each zone represents one hour. The astronomical observation in Greenwich, England, was chosen as the starting point for the time zone.
Most people have no trouble in agreeing that time moves forward. Some scientists believe there is one reason why time moves forward. It is clear we need a way to establish a common time for all parts of the world with scientific law: the second law of thermodynamics. The law says disorder increases with time.
选项
A、It measures the length of a day and a night.
B、it measures the movement of the sun each day.
C、It measures the passing of hours, minutes and perhaps seconds.
D、It measures the shadow of the stick across the flat surface of the sundial.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3590911.html
相关试题推荐
[originaltext]It’s8o’clockonTuesday,May1st.Hereisthenews:Betwe
[originaltext]It’s8o’clockonTuesday,May1st.Hereisthenews:Betwe
[originaltext]It’s8o’clockonTuesday,May1st.Hereisthenews:Betwe
[originaltext]Ihopeyouhaveallfinishedreadingtheassignedchapteron
[originaltext]Ozoneisaformofoxygen.Itisfoundintheairwebreath
[originaltext]Ozoneisaformofoxygen.Itisfoundintheairwebreath
[originaltext]W:Hey,Jim,whatacoincidencetoseeyouhere!Longtimenosee
[originaltext]W:Excuseme,Icametolookattheapartmentyouhaveadvertised
[originaltext]Oneimportantthingaboutartmovementsisthattheirpopular
[originaltext]Oneimportantthingaboutartmovementsisthattheirpopular
随机试题
Thatexperiencesinfluencesubsequentbehaviorisevidenceofanobviousbu
____________(决定取消搜索)whentherewasnohopeoffindingthemissingboat.Itwas
[originaltext]InAmerica,self-improvementisanationalpastime.Everyyear,m
Wewishtoassureyouthatweappreciateanopportunityaffordedusforservice.
如采用冷却灭火,对于木材燃烧必须将其冷却到()之下时,燃烧才会中止。A.燃点
载歌载舞是《贵妃醉酒》最具有特色的地方。( )
(2016年)下列摄影仪检校内容中,不属于胶片摄影仪检校内容的是()。A
A.预防血液传播性疾病 B.保持平卧位 C.作好配血准备 D.酌情产前住院
2020年J省完成货物进出口总额44500.5亿元,其中出口27444.3亿元,
186,114,150,132,141,()。 A.123B.132C.1
最新回复
(
0
)