The wheels of the first road vehicles were fashioned from crude stone disks.
A、hand-carvedB
暂无解析
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.
Creamoftartar酒石,aweakacid,canbeaddedtoeggwhitestohelpthemfoam泡沫whentheyarebeaten
TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.
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WhileBillieHolidaydidnotinventthemusiccalled"theblues",shemostassuredlyhelpedpopularizeit.
