ItwasthreeBritishsportsmenwho________banneddrugs.
求曲線y=x^2與直線y=0，x=1所圍成的平面圖形繞x軸旋轉(zhuǎn)一周所得旋轉(zhuǎn)體的體積V.
TheopportunitytoexploreandplayandtheencouragementtodosoCan________theperformanceofmanychildren．
設(shè)函數(shù)y=e^x+1，則y''=（）
Ipreferthisdiagram________thatone.
