diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index fac3ead..c8715fc 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2786,6 +2786,7 @@
 							  collapsed:: true
 								- mean, variance ((648c6007-c181-4e85-9a88-046841e6739d))
 							- Examples:
+							  collapsed:: true
 								- ((648c62d4-454b-43ab-88a8-d35a5a867523))
 								- ((648c63b8-21ff-42d4-ad87-70c706124ba1))
 							- Poisson limit theorem #flashcard