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
2011-05-26
28
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 tile sky in all 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、wherever
B、where
C、how
D、when
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/HslC777K
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
Manypeoplefindhomegardening______.Awell-plannedandwell-keptgardencanprovideasupplyoffreshvegetables______.
Everyonewantstobehealthyandhappy.【B1】,illnessoraccidentsmayoccurwithoutanywarning.Frequentlythepersonwhois
Accordingtothepassage,cultureshock______.WhichoneofthefollowingmayNOTbeasymptomofcultureshock?
"Doyouthink______Ishouldattendthelecture?"sheaskedme.
Studentsshouldbeallowedtostudywithoutworryingaboutgrades.Fortunately,mosteducatorsarebecomingawareofthefactth
(很小和时候),IdreamedoftravelinginEuropeancountries.
_______rich,I’dtravelaroundtheworld.
ThedoctorfeltJohn’sarmto______ifthebonewasbroken.
He’dphonedafriendforadviceandthenhadcrossedtheroofofthebuildingtotheapartmentoftheelderlywomanto(gether
Thewholeindustrialprocesswhichmakesmanyofthegoodsandmachinesweneedanduseinourdailylives,isboundtocreatea
随机试题
对于近端小管重吸收的叙述,恰当的是
某免疫原有10μg以下,制备抗血清应选择的免疫途径是
若名义利率为r,年初借款为P,在一年中计算利息m次,则每一计息周期的利率为r/m,一年后的本利和为:F=P(1+r/m)m,其中利息I=F-P=P(1+r/m)m-P,故实际利率i与名义利率r的关系表达式应为:i=(F-P)/P=(1+r/m)m-1通过这
审核信用证是单证员的工作,因此.跟单员不需要了解信用证的内容。()
某企业开发新产品发生的研究开发费用形成了一项无形资产,根据税法规定,可按该项无形资产成本的一定比例在税前摊销,这一比例是()。
孙某因不满其所在单位与他解除劳动合同而与单位产生纠纷,根据《劳动争议调解仲裁法》的规定,孙某可以寻求以下哪些劳动争议处理机构帮助进行协调?()
一种政治制度好不好,根本的判断标准是()。①看它是否促进了经济社会的发展②看它是否为广‘大人民群众所享用③看它是否符合人类普遍价值④看它是否适合中国国情
社会监督的主体主要有()。
根据以下资料。回答下列问题。2012年,某省农产品进出口贸易总额为7.15亿美元,比上年增长25%。其中,出口额为5亿美元,增长25%;进口额为2.15亿美元,增长32%。农产品进出口贸易额占全省对外贸易总额的5%。出口额居前5位的产品为蔬菜、畜
Amazon,whichgotitsstartsellingbooksonline,announcedthisyearthat,forthefirsttime,itsdigitalbookshadoutsold
最新回复
(
0
)