diff --git a/assets/section_3.4_1686989774901_0.edn b/assets/section_3.4_1686989774901_0.edn
index b9bf012..b46d72c 100644
--- a/assets/section_3.4_1686989774901_0.edn
+++ b/assets/section_3.4_1686989774901_0.edn
@@ -87,4 +87,4 @@
                           :page 16},
                :content {:text "[:span]", :image 1686991327483},
                :properties {:color "yellow"}}],
- :extra {:page 17}}
+ :extra {:page 15}}
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 5d6c3df..c9bb5a7 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2948,10 +2948,8 @@
 								- ((648d6e79-1d02-42c0-bc45-73dca7753118))
 						- Continuous case
 							- $X + Y$
-							  collapsed:: true
 								- ((648d718a-6ea6-45b9-96f7-2f89ecbf54f3))
 								- Can be written as: #flashcard
-								  collapsed:: true
 									- ((648d71bc-ca55-46f9-a7d4-22a339a7f9c0))
 									- Also: ((648d71dd-ce78-49c5-a12c-58dea53bd4cc))
 							- $min(X,Y)$