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wangxiaosheng · Apr 30, 2019 · b69e0e4 · b69e0e4
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diff --git a/13-16章.docx b/13-16章.docx
diff --git a/README.md b/README.md
@@ -66,7 +66,7 @@
 
    (进群先在MD版本增加、改善、提交内容后，更易进群，享受分享知识帮助他人。)
 
-   ![](./weixinqun.png)
+   ![](./qun5.png)
 
 3. Markdown阅读器推荐：https://typora.io/ 免费且对于数学公式显示支持的比较好。
 

diff --git a/qun5.png b/qun5.png