1如图1所示重10n的圆球沿着斜面�下滚动.请你用力的示意图表示圆球受到的重力.2如图2所示请你完成光路图.3如图3所示当 Template




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tomski1如图1所示重10n的圆球沿着斜面�下滚动.请你用力的示意图表示圆球受到的重力.2如图2所示请你完成光路图.3如图3所示当 coloring