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
49
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、east
B、south
C、west
D、north
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/xdvC777K
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______.Whichofthefollowingbestsummarizesthepassage?
Thefirstsailorpretendedtobeillbecausehewantedto______.Whenthecaptainknewhehadbeendeceived,he______.
Accordingtotheauthor,reallygoodscience______.Itcanbeinferredfromthepassagethatscientistsofthe18thcentury__
(Citybornandcitybred),Ihavealwaysregardedthecountryassomethingyoulookatthroughatrainwindow,orsomethingyou
Onetypeofpersonthatiscommonineverycountryistheonewho______.Themanwhomakesnoeffortisalwaystalkingabout_
Severalbankshavejoinedthe______inordertogivebetterservicetotheircustomers.
SeveralsmallearthquakeswerepredictedinNewYorkState,inthe______(east)partoftheU.S.A.
(Everyonelivesbysellingsomething.Inthelightofthisstatement),teacherslivebysellingknowledge,philosophersbyselli
"I’dliketobuyadigitalcamera.""Well,wehaveseveralmodels______."
______tookusseveralhourstoclearthesnowandopentheroadtotraffic.
随机试题
下列滴定方法不属于滴定分析类型的是()。
A.急性肾炎综合征B.急进性肾炎综合征C.肾病综合征D.慢性肾炎综合征E.隐匿性肾炎综合征(2003年第99题)轻微病变性肾小球肾炎的临床表现是
噬菌体在医学和生物学中有重要意义,其主要应用有
A/气喘气雾剂中的氟利昂B/鱼肝油乳中的阿拉伯胶C/维生素C注射剂中的碳酸氢钠D/氯霉素滴眼液中的尼泊金乙酯E/复方碘口服溶液中的碘化钾pH调整剂
某羊场,母羊表现不孕或怀孕后发生流产和产死胎;公羊睾丸肿胀,发热;羊场的工作人员3人出现发热,乏力,多汗,关节痛等症状。按照《中华人民共和国动物防疫法》规定,作为兽医工作者你应采取何种措施
下列有关人权与法的关系的表述,错误的是:()。
某大型商城当月销售甲产品300件,每件产品的成本为500元;乙产品100件,每件产品的成本为600元,月末结转已销产品的销售成本,这一经济事项的会计分录为:借:主营业务成本210000贷:库存商品2100
读某区域海平面等压线(单位:百帕)分布图,回答下列问题。由图可判断M和N两地天气()①M地比N地风力小②M地比N地风力大③M地比N地气流更暖湿④M地比N地气流更干冷
在美国备案申报纳税的公司中有38家公司纯收入超过1亿美元,在所有税收报表上报道的国外来源总的应征税收人中,它们占了53%。在国外来源总的应征税收人中,有60%是来自10多个国家的200份纳税申报。如上面陈述为真,则下面哪项也一定正确?()
设平衡的---X排序树(AVL树)的结点个数为n,则其平均检索长度为
最新回复
(
0
)