4.(单选题)-|||-由曲线 =(x)^3, 与直线 =2, =0 所围成的图形绕y轴旋转所得的立体的体积为 () .-|||-A (int )_(0)^2pi (x)^6dy-|||-B (int )_(0)^2pi (x)^6dx-|||-C pi -(int )_(0)^8pi (x)^2dy-|||-D pi -(int )_(0)^8pi (x)^2dx