如图所示一物体在拉力f的作用下沿斜面�上匀速运动在�上运动的过程中下列说法正确的是 A.物体的动能转化为重力势能b.拉力和�擦力是一 Template




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tomski如图所示一物体在拉力f的作用下沿斜面�上匀速运动在�上运动的过程中下列说法正确的是 a.物体的动能转化为重力势能b.拉力和�擦力是一 coloring