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
外语
What does February 29th mean to you? For most people it means an extra day at work, which might explain why a leap year is gener
What does February 29th mean to you? For most people it means an extra day at work, which might explain why a leap year is gener
admin
2019-02-25
44
问题
What does February 29th mean to you? For most people it means an extra day at work, which might explain why a leap year is generally considered to be unlucky. This is particularly so for those who only have the chance to celebrate their real birthday once every four years.
【B1】______The first attempt at rationalizing the calendar was made by the ancient Egyptians over two thousand years ago. Having worked out that there were 365 days in a year they realized that every fourth year would need 366 days and set up their calendars accordingly. It was another two hundred years or more before the Romans, under Julius Caesar, settled upon February as the month to which the extra day should be added.
【B2】______This is due to the fact that there are six hours left over from a strictly 365-day year. The rotation of the Earth around the sun, though predictable as far as orbit and gravity are concerned, is not as fixed as might be assumed as other factors, such as the effect of massive earthquakes, must be taken into account.
【B3】______The ancient Egyptians set the ball rolling by developing early versions of the sundial. Later timekeepers included burning candles and water flowing through measurable holes. Perhaps surprisingly, the first hourglass to use the flow of sand did not appear until medieval times. Nevertheless, measuring time remained a relatively inexact science and it was not until the invention of the pendulum clock in the seventeenth century that it became more accurate.
【B4】______the lack of precision in measuring hours and minutes created problems in the maritime sector. Sailors the world over had difficulty establishing exactly where they were at sea e-ven though they were able to use the sun and stars to guide them. The invention of reliable, sea-going clocks in the eighteenth century enabled sea-farers to calculate their longitude. This, coupled with knowledge of their latitude, took the guesswork out of pinpointing their position. Such advances meant that exploration of the oceans and trade by sea could flourish.
【B5】______The fact that these two clocks used different measuring systems meant that eventually they showed different times. As a result of this, in the 1970s scientists corrected the discrepancy by introducing the leap second. However, it is not needed every year—the last leap second was on 1st January 2006. Nevertheless, in spite of the advances in timekeeping the difficulty of measuring time with faultless precision has not been completely resolved.
The US has proposed using the atomic clock exclusively to measure world time thereby making the older timekeeping systems and leap seconds themselves redundant. If this method was adopted it would mean that time would no longer be measured by the rising and setting of the sun. However, there is some resistance to the idea as it is claimed that we would run the risk of being out of step with the rhythms of the planet’s natural cycle.
Questions 61 -65: Choose from the sentences A - G the one which best fits each gap of 61 - 65. There are two extra sentences which you do not need to use.
A. Apart from difficulties in measuring years and months with accuracy, which had an effect on the development of agriculture.
B. When early man began to farm the land, an understanding of how to measure time rapidly became a priority.
C. The earthquakes sometimes affect the relevant calculations of calendar.
D. Leap years are no new phenomenon.
E. In the 1950s the invention of the atomic clock revealed that timekeeping based on the movements of the Earth was less accurate than that based on vibrating atoms.
F. For us a leap year simply means that we have to work an extra day in February.
G. A calendar which, relies on the cycles of the sun is bound to run into trouble sooner or later, experts agree.
【B2】
选项
答案
G
解析
G项指出“专家认为,依靠太阳周期的日历迟早会出现问题”,该段随后解释了原因,即每年365天还会多出6个小时,并指出大地震等其他因素也会影响到地球围绕太阳转动的速度。前后衔接连贯自然。
转载请注明原文地址:https://kaotiyun.com/show/gD8K777K
本试题收录于:
B类竞赛(英语专业本科专科)题库大学生英语竞赛(NECCS)分类
0
B类竞赛(英语专业本科专科)
大学生英语竞赛(NECCS)
相关试题推荐
Oldpeoplearealwayssayingthattheyoungarenotwhattheywere.Thesamecommentismadefromgenerationto【C1】______andit
Spaceisadangerousplace,notonlybecauseofmeteorsbutalsobecauseofraysfromthesunandotherstars.Theatmosphereag
Ofalltheareasoflearningthemostimportantisthedevelopmentofattitudes.Emotionalreactionsaswellaslogicalthought
Interestinpursuinginternationalcareershassoaredinrecentyears,enhancedbychronic(长久的)personnelshortagesthatarecaus
—HowwouldyouliketogotoMcDonald’sforlunch?—______,butthereissomethingIhate,it’stoonoisyinsideespeciallydur
Ithasbeensaidthateveryonelivesbysellingsomething.Inthelightofthisstatement,teacherslivebyselling【C1】kno______
Ithasbeensaidthateveryonelivesbysellingsomething.Inthelightofthisstatement,teacherslivebyselling【C1】kno______
Ithasbeensaidthateveryonelivesbysellingsomething.Inthelightofthisstatement,teacherslivebyselling【C1】kno______
Todaymenarefacingnewexpectationsandnewchoicesabouttheircommitmentstosociety,familyandwork.Nolongercertainwha
______feltthatsocietyforcedtoomanyrulesonpeopleandkeptthemfromlivingafull,naturallife.Hisforcefulwritingon
随机试题
已知完全二叉树T的第5层只有7个结点,则该树共有______个叶子结点。
A.没有限制B.卧床休息为主,允许慢慢下床排尿、排便C.充分休息,增加睡眠D.绝对卧床休息E.避免重体力劳动心功能Ⅲ级应
该企业老总的决策是()。该老总对当地上这些项目的主要考虑不包括()。
下列有关公民权利能力的表述,有哪一项是错误的?()
外贸手续费的计费基础是()费用之和。
反映同一总体在不同时间上数量对比关系的相对数是()。
甲公司当期为研发新技术发生研究开发支出480万元,其中研究阶段支出120万元,开发阶段不符合资本化条件的支出140万元,符合资本化条件的支出220万元。假定该项新技术已经达到预定可使用状态,当期会计摊销额为22万元。税法规定,企业为开发新技术、新产品、新工
你发现一个同事在工作中遇到了困难,而你又具有解决这个困难的能力。在这种情况下,你通常采取的做法是()。
下列试题基于以下题干:某市体委对该市业余体育运动爱好者的一项调查中的若干结论:所有的桥牌爱好者都爱好围棋;有些围棋爱好者爱好武术;所有的武术爱好者都不爱好健身操;有些桥牌爱好者同时爱好健身操。如果在题干中再增加一个结论:每个围棋爱好者或者爱好武术或者
Likemanyotheraspectsofthecomputerage,Yahoobeganasanidea,【1】intoahobbyandlatelyhas【2】intoafull-timepassion.T
最新回复
(
0
)