14.如图所示在水平桌面上沿直线拉动木块下列属于一对平衡力的是 A.绳子对木块的拉力和木块对绳子的拉力b.手对绳子的拉力和桌面对木块的 Template




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tomski14.如图所示在水平桌面上沿直线拉动木块下列属于一对平衡力的是 a.绳子对木块的拉力和木块对绳子的拉力b.手对绳子的拉力和桌面对木块的 coloring