题目内容
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提问人:网友lhr3840_1977
发布时间:2022-01-07
[主观题]
At a instant, the magnitudes of velocities of poin...
At a instant, the magnitudes of velocities of pointsandin a plane figure areand, respectively, and. Which drawings are impossible for the velocity directions?
A、
B、
C、
D、
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