下列整式中是多项式的是( )_刷题宝

题干

下列整式中是多项式的是( )

A：- $\frac{1}{2}$

B：x+y

C： $\frac{a b}{3}$

D：-a²b²

上一题下一题 0.0难度选择题更新时间:2012-07-20 05:38:52

答案(点此获取答案解析）

B

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