• 2022-05-31
    求圆锥被两个平面切割后的水平投影和侧面投影。[img=210x418]18036bfd1800548.png[/img]
    A: [img=405x436]18036bfd26815a7.png[/img]
    B: [img=412x420]18036bfd35d088a.png[/img]
    C: [img=415x429]18036bfd43e711a.png[/img]
    D: [img=404x425]18036bfd51ed0f6.png[/img]