下列各组单项式是同类项的是( )
A.4x和4y | B.xy2和4xy | C.4xy2和﹣x2y | D.﹣4xy2和y2x |
更新时间:2019/03/02 04:44:56
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A.4x和4y | B.xy2和4xy | C.4xy2和﹣x2y | D.﹣4xy2和y2x |