某平面任意向 O 点简化,得到如图所示的一个力 ¢ 和一个力偶矩为 Mo 的力偶,则该的最后合成结果为 。
A.
作用在 O 点的一个合力;
B.
合力偶
C.
作用在 O 点右边某点的一个合力;
D.
作用在 O 点左边某点的一个合力
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