下列曲面是坐标面上的曲线绕z轴旋转一周形成的是()A. x^2 - y^2 = z^2B. x^2 + y^2 = 2z^2C. (x^2)/(2) + (y^2)/(3) + (z^2)/(3) = 1D. (x^2)/(3) + (y^2)/(3) - (z^2)/(3) = -1

下列曲面是坐标面上的曲线绕$z$轴旋转一周形成的是()

A. $x^2 - y^2 = z^2$

B. $x^2 + y^2 = 2z^2$

C. $\frac{x^2}{2} + \frac{y^2}{3} + \frac{z^2}{3} = 1$

D. $\frac{x^2}{3} + \frac{y^2}{3} - \frac{z^2}{3} = -1$