5xy2n的知识精选

若2x2my3与-5xy2n是同类项,则|m-n|的值是(   )A.0           B.7     ...
问题详情:若2x2my3与-5xy2n是同类项,则|m-n|的值是( )A.0           B.7             C.1                 D.-1【回答】C知识点:整式题型:选择题...
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