One of the triangles in the following figure represents the true shape of the plane.[img=145x189]1803a0cf3b33d38.jpg[/img]
举一反三
- As shown in the figure, which of the following is true? [img=399x398]1803a03c60cf5d2.png[/img][img=365x385]1803a03c6c3b38b.png[/img] A: FRC = F’RC = 0 B: FRC = 0, F’RC ≠ 0 C: FRC ≠ 0, F’RC ≠ 0 D: FRC ≠ 0, F’RC = 0
- People listen to music on the following three planes: (1)the _____________ plane, (2) the ___________plane, (3) the___________ _____________ plane.
- If a body of revolution is obtained when the plane figure, enclosed by [img=99x25]1803e249c891742.png[/img], [img=93x23]1803e249d0cf2dc.png[/img] and [img=11x14]1803e249d81ae7c.png[/img] axis, rotates around the [img=11x14]1803e249d81ae7c.png[/img] axis for one cycle, then its volume is [img=141x52]1803e249eb19a2f.png[/img].
- In Figure (a), +t indicates the increase of the temperature and -t indicates the decrease of the temperature. The shape of bending moment diagram of is as shown in Figure (b).[img=603x369]1803b80c6f7f661.png[/img]
- We have many ________ in the following picture.[img=991x733]18035d44eb1382d.png[/img] A: points B: lines C: triangles D: hearts