专四完型填空及答案

《专四完型填空及答案》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、2000年一．Thedifferencebetweenaliquidandagasisobvious(26)theconditionsoftemperatureandpressurecommonlyfoundatthesurfaceoftheEarth.Aliquidcanbekeptinanopencontainerand(27)ittothelevelofafreesurface.Agasformsnofreesurfacebut(28)todiffusethroughoutthespaceavailable;itmust(29)bekeptinaclo

2、sedcontainer,as(30)aplanet'satmosphere.Thedistinctionwasaprominentfeatureofearlytheories(31)thephasesofmatter.Inthenineteenthcentury,forexample,onetheorymaintainedthataliquidcouldbe"dissolved"inavaporwithoutlosingitsidentity,andanothertheoryheldthatthetwophasesare(32)differentkinds

3、ofmolecules(分子).Thetheoriesnowprevailing(33)aquitedifferentapproachbyemphasizingwhatliquidsandgaseshaveincommon.Theyarebothformsofmatterthathavenopermanentstructureandtheybothfloweasilly.Theyarefluids. 　　The(34)similarlyofliquidsandgasesbecomesclearlyapparentwhenthetemperatureandp

4、ressureareraisedsomewhat.(35)Aclosedcontainerpartiallyfilledwithaliquidisheated.Theliquidexpandsor(36)becomeslessdense;someofitevaporates.(37),thevaporabovetheliquidsurfacebecomesdenserastheevaporatedmoleculesareaddedtoit.Thecombinationoftemperatureanddpressure(38)thedensitiesbecom

5、eequalis(39)thecriticalpoint.Abovethecriticalpointtheliquidandthegascannolongerbe(40);thereis asingle,undifferentiatedfluidphaseofuniformdensity.　　26. A.in  B.onC.under  D.beyond　　27. A.fills  B.befilled C.filling D.tofill　　28. A.intends B.tendsC.inclines D.contends　　29. A.ho

6、wever B.neverthelessC.so D.therefore　　30．A.intheeventof    B.inthecaseofC.withaviewto  D.withreferenceto31. A.havingdescribed  B.describedC.describing  D.tohavedescribed　　32. A.madeupof   B.consistedofC.constitutedof   D.madefrom　　33. A.apply  B.adaptC.take  D.conduct　　34

7、. A.elementary  B.crucialC.rudimentary D.fundamental　　35. A.Suppose    B.TosupposeC.Beingsupposed D.Supposed　　36. A.inaword  B.inthemeantimeC.inotherwords  D.inthatcase　　37. A.Similarly B.IncontrastC.FurthermoreD.Instead　　38. A.onthat B.onwhichC.atthat  D.atwhich　　39. A.kn

8、own B.definedC.called  D.