diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 25738c5..3d84082 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -969,10 +969,12 @@
 							- Process of minimizing differences between
 							  entities by identifying their common
 							  characteristics.
-						- Two constraints that may apply to a
+						- Two constraints that may apply to a #flashcard 
+						  id:: 64896085-645b-408f-b17a-109b6cd82aeb
 						  specialization/generalization:
 							- participation constraints
-								- May be {{c1 mandatory}} or {{c1 optional}}.
+								- May be {{c1 mandatory}} or {{c1 optional}}. #flashcard
+								  id:: 648960d0-ae7f-4452-a1b9-cab8a9b13443
 							- disjoint constraints
 					- Superclass / Subclass
 						- Superclass :-> An entity type that includes one or more distinct