下面空间曲面名称正确的是( )A.-dfrac ({x)^2}(2)-dfrac ({y)^2}(3)+dfrac ({z)^2}(4)=1是双叶双曲面B.(x)^2+2(y)^2-(z)^2=0是椭球面C.dfrac ({x)^2}(2)+dfrac ({y)^2}(3)-dfrac ({z)^2}(4)=1是双叶双曲面D.-dfrac ({x)^2}(2)+dfrac ({y)^2}(3)=z是椭圆抛物面

下面空间曲面名称正确的是(   )

A.$-\dfrac {{x}^{2}}{2}-\dfrac {{y}^{2}}{3}+\dfrac {{z}^{2}}{4}=1$是双叶双曲面

B.${x}^{2}+2{y}^{2}-{z}^{2}=0$是椭球面

C.$\dfrac {{x}^{2}}{2}+\dfrac {{y}^{2}}{3}-\dfrac {{z}^{2}}{4}=1$是双叶双曲面

D.$-\dfrac {{x}^{2}}{2}+\dfrac {{y}^{2}}{3}=z$是椭圆抛物面