问题标题:
【TheChineseinventedpaperin105A.D.Theymixedthebarkofatreeandrags(破布)withwaterputascreenintothemixtureandliftedoutathinpieceofwetpaper.Theydriedthepaperinthesun.TheChinesekepttheirsecretofhow】
问题描述:
TheChineseinventedpaperin105A.D.Theymixedthebarkofatreeandrags(破布)withwaterputascreenintothemixtureandliftedoutathinpieceofwetpaper.Theydriedthepaperinthesun.
TheChinesekepttheirsecretofhowtomakepaperuntilawarwithMuslimsintheninthcentury.TheartofpapermakingsoonspreadthroughouttheMuslimworld.
TheMayanIndiansinCentralAmericaandPacificIslandersalsodiscoveredhowtomakepaperbuttheirknowledgeneverspreadtotherestoftheworld.
Forcenturiesallpaperwasmadebyhand.Ragswerethemainmaterial.ThenaFrenchscientistdiscoveredthatpeoplecouldmakepaperfromwoodtoo.Finallyintheeighteenthcentury.aFrenchmaninventedamachinetomakepaperfromwood.
【小题1】Whodiscoveredhowtomakepaper?
宫元九回答:
【小题1】D
【小题2】B
【小题3】B
【小题4】B
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