diff --git a/assets/section_2.5_1686968005870_0.edn b/assets/section_2.5_1686968005870_0.edn
index c843594..c933e37 100644
--- a/assets/section_2.5_1686968005870_0.edn
+++ b/assets/section_2.5_1686968005870_0.edn
@@ -190,4 +190,4 @@
                           :page 42},
                :content {:text "[:span]", :image 1686973793408},
                :properties {:color "yellow"}}],
- :extra {:page 42}}
+ :extra {:page 46}}
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index f876ccb..705f302 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2805,24 +2805,34 @@
 								- DONE Examples
 					- Distribution of continuous random variables ![section 2.5.pdf](../assets/section_2.5_1686968005870_0.pdf)
 						- Uniform Distribution
+						  collapsed:: true
 							- Definition, pdf and df :-> ((648d1aea-71f3-473b-8e72-d1ee4e629a91))
 							- ((648d1b0d-fdbf-4373-84a8-a072590881a1))
 							- Standard distribution ((648d1f39-bc89-4efe-98b3-1c654716cf65))
 							- Properties
+							  collapsed:: true
 								- mean and variance :-> ((648d1bfd-fcfb-43ed-801e-0de972c24cb1))
 						- Exponential Distribution similar to -> ((648c650a-e188-49a6-9f89-9a3407057ddf))
+						  collapsed:: true
 							- Definition: #flashcard
+							  collapsed:: true
 								- ((648d25a0-12d9-47c5-b9ca-f7cafdf15d89))
 								- Properties
+								  collapsed:: true
 									- Mean, variance :-> ((648d25a0-12d9-47c5-b9ca-f7cafdf15d89))
 									- Memory-less #flashcard
+									  collapsed:: true
 										- ((648d26c8-0292-4c02-8d6e-2b4f5cb10385))
 								- LATER Example: connection between Poisson and Exponential distribution
+								  collapsed:: true
 									- ((648d27e3-1886-4b09-a18d-8a89d33e745a))
 						- Normal Distribution
+						  collapsed:: true
 							- Definition #flashcard
+							  collapsed:: true
 								- ((648d2884-c239-4d00-9b6f-291bf4280dab))
 							- Properties:
+							  collapsed:: true
 								- ((648d2931-ae90-414a-b12c-e19aa1c534fc))
 								- ((648d294d-7bb2-4b6e-8aca-70dc4af6005c))
 								- Standard normal distribution :-> ((648d2960-d588-4610-a643-e292ef5b793f))
@@ -2830,12 +2840,15 @@
 								  id:: 648d29b8-bd11-4eb6-9240-941c2ff636f1
 								- Calculating negative ones :-> ((648d29da-0535-4dd3-ae79-48b34e047339))
 								- (Some sort of ) linearity :-> ((648d2d62-f5e5-491f-ae12-e9638ee75f7c))
-								-
 								- Example
+								  collapsed:: true
 									- in specified interval ((648d2c35-041a-4575-b39d-c42c1a6f532f))
 									- without knowing $$\mu$$ and $$\sigma$$: ((648d2cfd-2cef-48d2-b791-e5ac01e43fd8)) #flashcard
+									  collapsed:: true
 										- ((648d2cfd-2cef-48d2-b791-e5ac01e43fd8))
 								-
+						- ==Summary== #flashcard
+							-
 				-
 				-
 			- LATER 学积分