下列各式:①
;②
:③
:④
.其中错误的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff7939e16ac2121f82ba74d3e8344bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e6c8db67503c0c4432cc2768ba8423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf82d0306f6f5ce7b8aa3c8b4059e6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd0d0890bd348e1d7f2b6e5698dd20c.png)
A.4个 | B.3个 | C.2个 | D.1个 |
更新时间:2020-02-18 18:55:48
|
A.4个 | B.3个 | C.2个 | D.1个 |