首页
登录
职称英语
What does a sundial measure according to the passage? [br] [originaltext] Hu
What does a sundial measure according to the passage? [br] [originaltext] Hu
游客
2023-11-16
73
管理
问题
What does a sundial measure according to the passage? [br]
Humans have used may devices to measure time. The sundial was one of the earliest and simplest. A sundial measures the movement of the sun across the sky each day.
The sundial worked well only when the sun was shining. So other ways of measuring the passing of time were invented. One device was the hourglass. It used a thin stram of falling sand to measure time.
By the 1700s, people had 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 needed 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 observatory in Greenwich, England, was chosen as the starting point for the time zone.
Most people have no trouble agreeing that time moves forward. Some scientists believe there is one reason why time only moves forward. It is a will-known scientific law: the second law of thermodynamics. The law says disorder increases with time.
选项
A、3.
B、4.
C、5.
D、6.
答案
B
解析
本文共介绍了四种测量时间的设备,即日晷、沙漏、机械表以及现在的电子表。
转载请注明原文地址:http://tihaiku.com/zcyy/3192821.html
相关试题推荐
Whatkindofroomdoesthecustomerwanttoreserve?[br][originaltext]Custome
Whatkindofroomdoesthecustomerwanttoreserve?[br][originaltext]Custome
TheChinesespaceprogramaimsat______.[originaltext]Chinahasbegunits
Accordingtothenews,whetherthebirdfluwillcauseagreatcasualtydepends
Whatisthenationalityoftheresearchers?[br][originaltext]Happinessi
Whatisthenationalityoftheresearchers?[br][originaltext]Happinessi
Whatisthenationalityoftheresearchers?[originaltext]Happinessisasso
Whatisthetalkmainlyabout?[br][originaltext]Inthe18thcenturyFren
Whatisthetalkmainlyabout?[originaltext]Inthe18thcenturyFrencheco
Whathashappenedtotheman?[br][originaltext]M:Excuseme,madam.I’mastr
随机试题
Theageofgildedyouthisover.Today’sunder-thirtiesarethefirstgenerat
Thousandsofstudents,facultyandstaffboycottedclassesandstagedrallie
[originaltext]Lebanon’sstaunchlypro-Syrianpresidentsaidheintendstore
WhichofthefollowingnovelsisNOTwrittenbyJaneAusten?A、PersuasionB、North
下列哪一种疾病不属于联合免疫缺陷病(SCID)A、性联淋巴细胞减少伴低丙种球蛋白
A.x>2 B.x≥2 C.x≠2 D.x≤2
下列关于仪器仪表说法正确的是()。(A)仪器仪表保养每半年不少于1次,确保处
简述360度评估的内涵。
某一滑坡面为折线的单个滑坡,拟设计抗滑结构物,其主轴断面及作用力参数如图8、表6
A.锭剂 B.灸剂 C.条剂 D.熨剂 E.糕剂供外用插入以引流脓液、拔
最新回复
(
0
)