1 . 已知n,m为正整数,且
,则在下列各式中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856b137a34d2d5b20671b7a3c7a29606.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b70449a1181a9acd05e2cdae3805846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b70449a1181a9acd05e2cdae3805846.png)
A.30 | B.24 | C.20 | D.15 |
您最近一年使用:0次
A.![]() | B.![]() | C.![]() | D.![]() |
A.30 | B.24 | C.20 | D.15 |