diff --git a/README.md b/README.md
index ccc29a8..fc18b56 100644
--- a/README.md
+++ b/README.md
@@ -5,8 +5,7 @@
 
 # [1 OS](OS.md)
 
-提供OS.
-
+提供OS..
 
 
 # [2 JAVA](JAVA.md)