计算
的结果为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f32157aa20575a15d749be9a5269b04.png)
A.-1 | B.0 | C.1 | D.-a |
更新时间:2019-09-18 12:08:41
|
A.-1 | B.0 | C.1 | D.-a |