diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 8361a2b..6e9a3a5 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1007,6 +1007,7 @@
 							- The instances of a potential subclass participate in a relationship unique to that subclass.
 			- DONE Block 3
 				- DONE DB transaction management
+					- anomalies
 					- DONE ACID (Atomicity, Consistency, Isolation, Durability): A set of properties that guarantee the reliability and integrity of database transactions.
 						- Atomicity: The property that ensures a transaction is treated as a single, indivisible unit of work. It either executes all its operations successfully or rolls back to the initial state if any operation fails.
 						- Consistency: The property that ensures a transaction transforms the database from one consistent state to another consistent state. It maintains data integrity and adheres to defined business rules.
@@ -1033,7 +1034,7 @@
 							  validation checks, concurrency control mechanisms can ensure that
 							  transactions are executed in a way that maintains data consistency and
 							  serializability.
-					- DONE Recovery Control
+					- ==DONE Recovery Control==
 						- DONE Some causes of database failure.
 							- System crashes, resulting in loss of main memory.
 							- Power failures
@@ -1103,14 +1104,13 @@
 						- Performance Transparency: must perform as if it were a centralized DBMS.
 					- advantages and disadvantages of distributed databases
 				- DONE XML
-				  collapsed:: true
-					- XML definition and basic concepts
+					- LATER XML definition and basic concepts
 					  collapsed:: true
 						- eXtensible Markup Language
 						- A meta-language (i.e. a language for describing other languages) that
 						  enables designers to create their own customised tags to provide
 						  functionality not available with HTML.
-					- Relational model versus XML
+					- LATER Relational model versus XML
 					  collapsed:: true
 						- SQL
 						  collapsed:: true
@@ -1121,12 +1121,12 @@
 							- is a markup specification language
 							- You can: design ways of describing information (text or data), usually for storage, transmission, or processing by a program (you can use it in combination with a programming language).
 							- It says nothing about what you should do with the data (although your choice of element names may hint at what they are for).
-					- Well-formed XML, Valid XML
+					- LATER Well-formed XML, Valid XML
 					  collapsed:: true
 						- Adheres to basic structural requirements - Single root element
 						- Matched tags, proper nesting
 						- Unique attributes within elements
-					- DTD, XSD
+					- LATER DTD, XSD
 					  collapsed:: true
 						- DTD: Defines the valid syntax of an XML document
 						- XSD: a more comprehensive method of defining content model of