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在静力学中,3根缆绳以力 \vec F_1 = (5, 0) 、 \vec F_2 = (-3, 4) 、 拉点 。为平衡,。(答:。)
在静力学中,3根缆绳以力 \vec F_1 = (5, 0) 、 \vec F_2 = (-3, 4) 、 拉点 。为平衡,。(答:。)
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