diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 79647f2..dd452de 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2933,7 +2933,8 @@
 						  collapsed:: true
 							- ((648d6bc0-6d8b-42a8-bb45-1f700e4855cf))
 							-
-					- ![section 3.4.pdf](../assets/section_3.4_1686989774901_0.pdf)
+					- One function of two random variables ![section 3.4.pdf](../assets/section_3.4_1686989774901_0.pdf)
+						-
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01