1/5单选题
难度：
1.在下列二次根式中，与
可以合并的二次根式是（）
可以合并的二次根式是（） | A |  |
| B |  |
| C |  |
| D |  |
正确答案：Qw==
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
是最简二次根式，它与
是可以合并的二次根式，则a的值为（） 
的结果是（） 
（2）
（3）
（4）
（5）
，
，那么
的值为（） 
