Update chapter4_memory.md

4 years ago · abefc65cf9
parent 4477a7d039
commit abefc65cf9
1 changed files with 2 additions and 2 deletions
--- a/chapter4_memory.md
+++ b/chapter4_memory.md
@ -789,7 +789,7 @@ $ git commit -a -m "my work on lab2_3 is done."

 <a name="lab2_challenge1_pagefault"></a>

-## 4.5 lab2_challenge1 挑战一：pagefaults
+## 4.5 lab2_challenge1 挑战一：pagefaults（难度：&#9733;&#9734;&#9734;&#9734;&#9734;）

 <a name="lab2_challenge1_app"></a>

@ -903,7 +903,7 @@ $ git merge lab2_3_pagefault -m "continue to work on lab2_challenge1"

 <a name="lab2_challenge2_singlepageheap"></a>

-## 4.6 lab2_challenge2 挑战2：singlepageheap
+## 4.6 lab2_challenge2 挑战2：singlepageheap （难度：&#9733;&#9733;&#9733;&#9733;&#9734;）

 <a name="lab2_challenge2_app"></a>