diff --git a/other/download.md b/other/download.md
index 60573fd4..56dd945c 100644
--- a/other/download.md
+++ b/other/download.md
@@ -1,6 +1,6 @@
 # 科普
 
-<a href="https://pan.baidu.com/s/1fKo7ntvQUettvjaTQqyCEw"> <img src="s1113106.jpg" width="150"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1fII84UPuo8aIxDkOakvUVg"> <img src="s4379914.jpg" width="150"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1fKo7ntvQUettvjaTQqyCEw"> <img src="s4687321.jpg" width="150"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1dNFZcBdDhA80-pWT1qcQSg"> <img src="s9114855.jpg" width="150"/> </a> &nbsp;&nbsp; 
+<a href="https://pan.baidu.com/s/1fKo7ntvQUettvjaTQqyCEw"> <img src="s1113106.jpg" width="150"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1fII84UPuo8aIxDkOakvUVg"> <img src="s4379914.jpg" width="150"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1YTp7vDp0VG2Ckz5_I91FIg"> <img src="s4687321.jpg" width="150"/> </a> &nbsp;&nbsp; <a href="https://pan.baidu.com/s/1dNFZcBdDhA80-pWT1qcQSg"> <img src="s9114855.jpg" width="150"/> </a> &nbsp;&nbsp; 
 
 # 网络