下列正确说法的个数是
①同位角相等；②对顶角相等；③等角的补角相等；④两直线平行，同旁内角相等 [ ]
A．1
B．2
C．3
D．4
答案：B
圆柱体和圆锥体的底面半径的比是2：3，高的比是4：3，则圆柱与圆锥的体积比是______：______．
Recently I bought a beautiful car, ________ was reasonable.
A．of which price
B．the price of whose
C．the price of which
D．which price
