• 2022-06-04
    已知轴线正交的圆柱和圆锥公切于一圆球面,正确的投影是:( )
    A: [img=147x136]1803054791020d9.png[/img]
    B: [img=136x134]180305479bf49e1.png[/img]
    C: [img=148x145]18030547a6b71c3.png[/img]
    D: [img=152x136]18030547b072406.png[/img]