如图所示倾斜的传送带保持静止一木块从顶端以一定的初速度匀加速下�到底端.如果让传送带沿图中虚线箭头所示的方�匀速运动同样的木块从顶端以 Template




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tomski如图所示倾斜的传送带保持静止一木块从顶端以一定的初速度匀加速下�到底端.如果让传送带沿图中虚线箭头所示的方�匀速运动同样的木块从顶端以 coloring