英美报刊选读复习题

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1、b・WhatwasdisappointingaboutKohoutek・d.HowKohoutekwastracked・)b・Itpassestheearthonceacentury.d・Scientistshavebeentrackingitforacentury.c.Itdidnotprovidevaluablescientificinformation.d・Itwasmovingtoorapidlyforscientiststophotograph・4.BeforetheinvestigationonKotoutek,wherehadmethylc

2、yanidebeenknowntoexist?()a.Incomets.b.Onasteroids.c.BetweenJupiterandNeptune・5.Accordingtothepassage,whatisonemajorcomponentofJupiter?()a.Hydrogencyanide・b・Methylcyanide・c.Hydrogen.6.WhataspectofKohoutekdidscientistsfindmostinteresting?()a.Itsshape・b.Itscomposition.c.Itsorbit.d.B

3、eyondthesolarsystem.d.Ammonia.d.Itssize.7.WhichofthefollowingquestionisbestansweredbyinformationgainedfromKohoutek?()a.Wherewerecometsformed?b.Whenwerecometsformed?英美报刊选读复习题一.ReadingComprehensionPassage1Itwasnot"thecometofthecentury"expertspredicteditmightbe.Nevertheless,Kohoutek

4、hasprovidedabonanzaofscientificinformation.Itwasfirstspotted370millionmilesfromtheearth,byanastronomerwhowassearchingskyforasteroids,andafterwhomthecometwasnamed.ScientistswhotracedKohoutektenmonthbeforeitpassedtheearthpredictedthecometwouldbeabrilliantspectacle・ButKohoutekfellsh

5、ortofthisprediction,disappointingmillionsofamateurskywatchers,whenitprovedtoopaletobeseenwiththeunaidedeye.Researchersweredelightednonethelesswiththenewinformationtheywereabletogleanfromtheirinvestigationofthecomet.Perhapsthemostsignificantdiscoverywastheidentificationoftwoimport

6、antchemicalcompounds-methylcyanideandhydrogencyanide-neverseenincometsbefore,butfoundinthefarreachesofinterstellarspace・Thisdiscoveryrevealednewcluesabouttheoriginofcomets.Mostastronomersagreethatcometsareprimordialremnantfromtheformationofthesolarsystem,butwhethertheywerebornbet

7、weenJupiterandNeptuneormuchfartherouttowardinterstellarspacehasbeenthesubjectofmuchdebate.IfcompoundsnomorecomplexthanammoniaandmethanekeycomponentsofJupiter,wereseeincomets,itwouldsuggestthatcometsformwithintheplanetaryorbits.Butmorecomplexcompounds,suchasthemethylcyanidefoundin

8、Kotoutek,pointtoformationfarbeyondthepla