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> 3a・4a=                                                 ...

3a・4a=                                                 ...

问题详情:

3a・4a=                                                 ...

3a・4 a =                                                            (    )

       A.7 a             B.12 a             C.7 a2            D.12 a2

【回答】

D  

知识点:整式的乘法

题型:未分类

标签: 4A 3A
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