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1、《大学英语I》复习思考题PartLReadingComprehension题目答案及解析CanalsexistedinEgyptthousandsofyearsago.ThegreatcanalatBabylonwasbuiltabout2000B.C.TheGrandCanalofChina,whichisover900mileslong,wasbegunabout2500yearsago,andtookcenturiestofinish.Duringtheseventeenthcentury,Francebuiltmany
2、canalsthatarcstillinusetoday・However,theyarcnotsoheavilytraveledastheywereahundredyearsago,beforerailwayswerebuilt.Onesuchcanalisashort-cutbetweentheAtlanticOceanandtheMediten-anean・CanalsinGermanypermitboatstogofromtheBlackSeatotheNorthSea・TheKielCanalprovidesapass
3、agewaybetweentheNorthSeaandtheBaltic.InAmerica,theGreatLakesarcallconnectedbycanals,enablingshipstogofromtheAtlanticOceanandtheSt.LawrenceRivertoLakeSuperio匚Itisimpossibletoanswerthequestion,“Whobuiltthefirstcanal?"Perhapssomepeoplelongago,livinginadrycountry,discov
4、eredthattheycoulddigditchestoirrigatetheirfieldswithriverwaterAnd,naturally,inthedayswhenboatswerethemostimportantmeansoftransport,canalsweretheeasiestmeansofreachingaplacethatwasnotonariver.Acanaljoiningtworiversprovedbotheasyandtime-savingforboattravel.Today,mostc
5、ountriesistheworldhavecanals,eveninthetwentiethcentury,goodscanmovemorecheaplybyboatthanbyanyothermeansoftransport・Somecanals,suchastheSuezorthepanama,saveshipsweeksoftimebymakingtheirvoyageathousandmilesshorter.Othercanalspermitboatstoreachcitiesthatarenotlocatedon
6、thecoast.Stillothercanalsdrainlandswherethereistoomuchwater,helptoirrigatefieldswherethereisnotenoughwater,andfiirnishwaterpowerforfactoriesandmills.1.Whichofthefollowingpairsofplaceshasnotyetbeenconnectedbycanal?A.TheNorthSeaandtheBlackSea.B.TheAtlanticOceanandtheM
7、editerraneanSea・C.TheNorthSeaandtheBaltic.D.TheBlackSeaandtheBaltic.2.Accordingtothispassage,canalsinEuropewerebuiltprimarilyfor■A.transportB.irrigationC・drainageD.electricity3.11isimpliedinthepassagethatthefirstcanalwasprobablybuilt•A.inChinaB.about2000B.C.C.forirr
8、igationD.forboattravel4.Whichofthefollowingstatementsisnottrueaccordingtothispassage?A.Boatstravelfasterinthecanalthanintheriver.DACACB.Ca
