22-23七年级上·全国·课前预习 查看更多[2]
更新时间:2022-07-30 09:16:32
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【推荐2】下列式子中:①﹣
;②a+b;③
;④
;⑤a2﹣2a+1;⑥
x,是整式的有_____ (填序号)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42951470eae119eb3c531cfc11326b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5499bc57f7181c43320ddb242493f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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