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
Edmund Halley was an English scientist who lived over 200 years ago. He studied the observations of comets (彗星) ,which other sci
Edmund Halley was an English scientist who lived over 200 years ago. He studied the observations of comets (彗星) ,which other sci
admin
2009-08-21
89
问题
Edmund Halley was an English scientist who lived over 200 years ago. He studied the observations of comets (彗星) ,which other scientists had made. The orbit (轨道) of one particular comet was a very difficult mathematical problem. He could not figure it out. Neither could other scientists who dealt with such problems.
However, Halley had a friend named Newton, who was a brilliant mathematician. Newton thought he had already worked out that problem, but he could not find the papers on which he had done it. He told Halley that the orbit of a comet had the shape of an ellipse (椭圆形) .
Now Halley set to work. He figured out the orbits of some of the comets that had been observed by scientists. He made a surprising discovery. The comets that appeared in the years 1531,1607, and 1682 all had the same orbit. Yet their appearances had been 75 to 76 years apart.
This seemed very strange to Halley. Three different comets followed the same orbit. The more Halley thought about it, the more he thought that there had not been three different comets, as people thought. He decided that they had simply seen the same comet three times. The comet had gone away and had come back again.
It was an astonishing idea! Halley felt certain enough to make a prediction of what would happen in the future. He decided that this comet would appear in the year 1758. There were 53 years to go before Halley’s prediction could be tested.
In 1758 the comet appeared in the sky. Halley did not see it, for he had died some years before. Ever since then that comet had been called Halley’s comet, in his honour.
选项
A、some different comets appearing several times
B、the same comet appearing at different time
C、three different comets appearing three times
D、several comets appearing at the same time
答案
B
解析
本题属细节信息归纳推理型。其中关键词为Edmund Halley figured out...or bit。根据第4段第4句可以看出这三次出现的彗星实为同一彗星,只是出现的时间不同而已。故B项是正确答案。
转载请注明原文地址:https://kaotiyun.com/show/UVSC777K
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
Canyougiveme______details,please?
Accordingtothepassage,thecomingofonlinejobsearchingbrings______.Accordingtothepassage,theInternethasrevoluti
Scientistssayitmaybetenyears______thismedicinewasputtouse.
Inthissixthgradeclassroom,youwouldfind______.Asmallpercentageofgirlsmakingupthecomputerscienceclasseswould
WhataresomeoftheproblemsthatChromiumⅥcancause?WhathappenedtopeoplewholivedinWillitsfrom1964~19957
Ifapersonfindsgettingupearlyaproblem,mostprobably______Whichofthefollowingmayleadtofamilyquarrelsaccording
—I’mafraidIhavetogonowJim.—I’dratheryou______goalone,It’salreadytoolate.
—Whoseumbrellaisit?—It’s______.
ThisisNewsontheHour,EdWilsonreporting.ThePresidentandFirstLadywillvisitAfricaonagoodwilltourinMay.Theypl
Wilson:Hello.MayIspeaktoPeter?Peter:______
随机试题
简述排尿反射的过程。
患者,男,22岁。近3周出现间断上腹痛,饭后减轻,近3天排柏油样便,量约300g/d,伴头晕,活动后心慌。查体:贫血貌,腹部平软,无压痛,无肌紧张,肝脾未及,肠鸣音活跃。为明确出血病因,最需要进行的检查是
A.先煎B.后下C.包煎D.另煎E.烊化
尿液一般检查应留取()
A市B县人民法院受理王海诉邹天名誉侵权纠纷一案,判决邹天在判决生效后1个月内赔偿王海10万元,承担诉讼费用,并在该市日报上登报赔礼道歉.日后不得在任何场合有侵害王海名誉的言行。邹天不服,提起上诉。A市中级人民法院经审理作出维持原判的二审判决。判决于5月l2
可视为生产物流系统的终点,也是销售物流系统起点的是()。
设事件A={抽10件产品,检验发现不合格品不多于5件},事件B={抽10件产品,检验发现不合格品至少有7件},则下列叙述正确的有()。
肺活量
从中华人民共和国成立到社会主义改造基本完成,作为一个过渡形态阶段,党在这时期的总路线和总任务,是要在一个相当长的时期内,逐步实现国家的社会主义工业化,并逐步实现国家对农业、手工业和资本主义工商业的社会主义改造。这条总路线最显著的特点是()
A、Itissimilartohousingproblem.B、Itgetsbetterwhenonecitydevelops.C、Itiscausedbymoneyortechnology.D、Itrelates
最新回复
(
0
)