如图,在
中,
,
于点E,F为
的中点,连结
,下列结论:①
;②
;③
;④
,其中错误结论的个数共有__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3ba8b214034c287276f4966069d95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c897a54f2e36bc4b52fba74b41c89d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f21dcfb9c8beea65f3bf201341dbeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c98b148518587d61a2907cdfd6ee4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f586a2079d0e382ef843f4dbe068566e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ffcdad73e2d420154a966b7597f0445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c0b4aad47c4e03a1c9d5f848507f6b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/23/9f677ef5-186b-435e-b1b5-00e7bf4fd1e3.png?resizew=162)
更新时间:2023-10-20 18:31:27
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