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
70
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 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 overhead. 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 meridean", or before midday, and PM for after midday. Each or the world’s time zones (时区)is about fifteen 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 time 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、on
C、of
D、from
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/divC777K
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
阅读《世说新语》中的一段文字,然后回答下列小题。石崇与王恺争豪,并穷绮丽以饰舆服。武帝,恺之甥也,每助恺。尝以一珊瑚树高二尺许赐恺,枝柯扶疏,世罕其比。恺以示崇。崇视讫,以铁如意击之,应手而碎。恺既惋惜,又以为疾己之宝,声色甚厉。崇曰:“不足恨,
Ifitwereonlynecessarytodecidewhethertoteachelementarysciencetoeveryoneonamassbasisortofindthegiftedfewan
Theauthorquestionswhether,inAmerica,the"pursuitofhappiness"______.Theauthorregardsthehairdosandclothing,drugs
Accordingtothepassage,whetheryoucangetothers’helpwillmainlydependon______.Youwilllikelybeabletogethelpfr
______isnotknownwhattheydiscussedinthemeeting.
Thechildtiptoed(翘起脚尖走)quietlytothebirdintotheforestwhenhewasabouttocatchit.
Mostofustrademoneyforentertainment.Movies,concertsandshowsareenjoyablebutexpensive.(78)Ifyouthinkthatyoucan
Mostofustrademoneyforentertainment.Movies,concertsandshowsareenjoyablebutexpensive.(78)Ifyouthinkthatyoucan
Itisnecessarythatshe______tothehospitalatonce.
Nickwastiredoflife.Everydaywasexactlythesame."WhatIneedisalittleadventure!"Nickthoughtashewaitedatth
随机试题
网络消费者的_______差异是网上市场细分的内在依据。【】
本国经济环境、区域经济环境、全球经济环境、_______和国际金融环境共同组成了国际经济环境。
【R1】______Ifwevalueneatness,ourteenagerswillbesloppy.They’llleavetheirroomsdisorderedandtheirclothesdirty.Ifw
某男,在矿山工作8年后,调至某办公室工作,3年后发生尘肺,该病人的职业病诊断治疗费用承担者应是
结石长期存在,可引起的尿路恶性肿瘤为
主要用于热水供应及高压蒸汽管路的阀门为()。
以下选项中,属于商标资产的价值特征的有()。
关于金融市场功能的说法中,错误的是()。
我国第一所乡村幼稚园的创办人是()。
设X1,…,X9为来自正态总体X~N(μ,σ2)的简单随机样本,令Y1=(X1+…+X6),Y2=(X7+X8+X9),S2=证明:Z~t(2).
最新回复
(
0
)