沿倾角不同动�擦因数相同的斜面�上拉同一物体若上升的高度相同则 A.沿各斜面克服重力做的功相同b.沿倾角小的斜面克服�擦做的功大些c Template




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tomski沿倾角不同动�擦因数相同的斜面�上拉同一物体若上升的高度相同则 a.沿各斜面克服重力做的功相同b.沿倾角小的斜面克服�擦做的功大些c coloring