如图所示木块在推力f作用下�右匀速运动下列说法中正确的是 A.物体一定受�擦力b.物体所受�擦力与推力的合力一定为零c.物体所受�擦力 Template




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tomski如图所示木块在推力f作用下�右匀速运动下列说法中正确的是 a.物体一定受�擦力b.物体所受�擦力与推力的合力一定为零c.物体所受�擦力 coloring