A.xn的知识精选

当n等于3时,下列各组是同类项的是(   ).A.xn与x3yn-1                   B....
问题详情:当n等于3时,下列各组是同类项的是(   ).A.xn与x3yn-1                   B.xnyn-1与3x6-ny2C.5x2yn-2与5y2xn-2                           D.-2x3y与xn-6y【回答】B  ...
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