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
专升本
Everyone uses the expressions AM and PM. But do you exactly know what they mean and how they came into being? As you know, t
Everyone uses the expressions AM and PM. But do you exactly know what they mean and how they came into being? As you know, t
admin
2011-03-26
50
问题
Everyone uses the expressions AM and PM. But do you exactly know what they mean and how they came into being?
As you know, the turning of the earth makes the sun and the stars seem to move across the sky. Daylight,of course,【21】. when the sun rises in the east and ends in the west,when the sun is high【22】the sky, between these two positions, half of the daylight hours have been spent.
Therefore, by noticing【23】the sun stood in the sky, early man know they could tell the time of the day. At night the motion of the stars【24】the same purpose. The important thing in keeping time is to know the exact moment of【25】. For each of us,wherever we are, noon is when the sun is directly over head. Think of an imaginary line【26】the sky, stretching from the north point of your horizon just to the south point.
When the sun cross your meridian (子午线), it is noon for you. When the sun still【27】of this line, or the meridian, it is morning. After the sun has crossed this line, it is【28】.
The Latin word for" midday" is" deridian" ,【29】which comes our word meridian. So AM is an abbreviation(缩写词) for "ante meridian " ,of before midday, and PM for after midday. Each of the world’s time zones(时区)is about fifteer degrees wide in longitude(经度) ,which is about the distance the sun moves through the sky in an hour.【30】lives in the same zone observes noon at the same moment. In this way, the time is different by one hour. as you move through each time zone.
选项
A、in
B、of
C、from
D、on
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/JdvC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Thefirstsailorpretendedtobeillbecausehewantedto______.Whenthecaptainknewasailorwasill,he______.
(他别无选择)buttolayfactsbeforethepublicexactlyastheyoccurred.
Heiswidely______asoneofourbestyoungscientists.
Whenyouaremakingaspeech,alwaysremembertokeepitshortand______.
Itisimportantforeveryone______learnEnglish.
Ifitwereonlynecessarytodecidewhethertoteachelementarysciencetoeveryoneonamassbasisortofindthegiftedfewan
Everyonewashomefortheholidays.Whatcouldmakefor______Christmasthanthat?
(Everyonelivesbysellingsomething.Inthelightofthisstatement),teacherslivebysellingknowledge,philosophersbyselli
Recently,severalthousandcomputersintheUnitedStateswereattackedbyavirus.Thecomputerswereslowedorshutdown.But
随机试题
关于撰写出版前言的说法,正确的有()。
乳癖的好发年龄是()乳疬的好发年龄是()
下列混凝土工作性的影响因素中,属于外因的是()。
审查方式主要有()
()是一种利益共享、风险共担的集合投资方式,即通过发行基金单位,集中投资者的资金,由基金托管人管理和运用资金,从事股票、债券、外汇等投资。
分析桃花坞年画《上海火车站》。
甲、乙两地相距20千米,小孙与小张分别从甲、乙两地同时相向而行,两小时后在途中相遇,然后小孙返回甲地,小张继续前进,当小孙回到甲地时,小张离甲地还有2千米。问小孙的速度是多少?()
于1948年首先用投射法对成就动机进行实验研究的心理学家是()
Readthesesentencesbelowandthesharepricesontheoppositepage.Whichstockmarket(A,B,CorD)doeseachsentence(1-7)de
Whichofthefollowingistheworld’soldestnationalnewspaper?
最新回复
(
0
)