单选题 PassageFour Questions16to20arebasedonthefollowingpassage. ItishardtoimaginelifewithoutArabicnumbers(数字).Noothernumbersystemeverinventedhasasimplewaytowriteanumberlike1984.InRomannumeral,itcomesoutlikethisMCMLXXXIV.Imaginehowdifficultitwouldbeforaschoolpupiltorememberit! TheArabs,however,calltheirnumbers“Indiannumerals”.ThisisprobablybecausetheygottheoriginalideaalongtimeagofromIndia.Therewerenoprintednewspapersorscientificmagazinethen,somathematicstraveledalongthesameroutesthatsilkdid,asbusinessmensoldandboughtgoods.{{U}}TheArabstookthenewnumbersandmadeimprovementsthatquicklyledtoadvancesintechnology.{{/U}} TheachievementofArabictechnologycanbeseenfromapassageina10th-centurybookaboutanArabiccity:”Theneighboringcountryshowedtheresultsofcarefulworkinagriculture,trade,andindustry.RiceandmanyotherplantsweregrowninfieldswithwatersuppliedbyArabengineers.Thecityincluded900publicbaths,stone-coveredstreets,fountains,andbeautifulbuildings.”Atthistime,Londonwasasmalltownwithdirtystreets,andBerlinwasafarmingvillage.{{U}}Infact,citiesoutsidetheArabworlddidnotreachthesamelevelofsocialdevelopmentuntilcenturieslater.{{/U}}
单选题 ThispassagetellsusthattheArabswereapeople_______________.
【正确答案】 B
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单选题 Ittakesmuchmoreeffortsto___________.
【正确答案】 A
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单选题 TheArabscalltheirnumerals“Indiannumerals”because_________.
【正确答案】 D
【答案解析】
单选题 Accordingtothepassage,theArabpeople___________.
【正确答案】 A
【答案解析】
单选题 Froma10th-centurybook,wecanlearnthat___________.
【正确答案】 C
【答案解析】