求圆锥被两个平面切割后的水平投影和侧面投影。[img=291x433]180395e3a864fe5.png[/img]
A: [img=408x457]180395e3b63ecbf.png[/img]
B: [img=414x453]180395e3c312a76.png[/img]
C: [img=405x454]180395e3d088472.png[/img]
D: [img=421x449]180395e3df0e6ac.png[/img]
A: [img=408x457]180395e3b63ecbf.png[/img]
B: [img=414x453]180395e3c312a76.png[/img]
C: [img=405x454]180395e3d088472.png[/img]
D: [img=421x449]180395e3df0e6ac.png[/img]
举一反三
- 求圆锥被两个平面切割后的水平投影和侧面投影。[img=291x433]180319c8dbcdd60.png[/img] A: [img=408x457]180319c8e98550d.png[/img] B: [img=414x453]180319c8f6c1f6f.png[/img] C: [img=405x454]180319c90349d41.png[/img] D: [img=421x449]180319c91013398.png[/img]
- 求圆锥被两个平面切割后的水平投影和侧面投影。[img=291x433]18036bfd236e78d.png[/img] A: [img=408x457]18036bfd30b321a.png[/img] B: [img=414x453]18036bfd3f3e257.png[/img] C: [img=405x454]18036bfd4cb93ea.png[/img] D: [img=421x449]18036bfd5c25afd.png[/img]
- 求圆锥被两个平面切割后的水平投影和侧面投影。[img=291x433]180319c44e54dfb.png[/img] A: [img=408x457]180319c45d592df.png[/img] B: [img=414x453]180319c46ac6054.png[/img] C: [img=405x454]180319c477a9aa6.png[/img] D: [img=421x449]180319c48427a0f.png[/img]
- 设X~U(a,b), a>;0,E(X)=3, D(X)=[img=15x41]17e438378e5b7d7.png[/img], 则P(1<;X<;3)=____。
- 设X~U(a,b), a>;0,E(X)=3, D(X)=[img=15x41]17e0a8afbe72bb4.png[/img], 则P(1<;X<;3)=____。