一个圆柱的底面积是S，高是h，把它削成一个与它等底等高的圆锥，削去的体积是 请选择ABCD3g/S1]9|4u7j'w2Y,F9f5w;]8U1s:R7H3?1{+A(B/~/S;J
A．1/3Sh8U1s:R7H3?1{+A(B/~/S;J
B．2/3Sh8U1s:R7H3?1{+A(B/~/S;J
C．1/2Sh8U1s:R7H3?1{+A(B/~/S;J
D．Sh8U1s:R7H3?1{+A(B/~/S;J