如图6所示是自行车传动结构的示意图假设脚踏板每n秒转一圈要知道在这种情况下自行车的行驶速度则 � 还须测量哪些物理量在图中标出并写出 Template




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tomski如图6所示是自行车传动结构的示意图假设脚踏板每n秒转一圈要知道在这种情况下自行车的行驶速度则 � 还须测量哪些物理量在图中标出并写出 coloring