diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 3a34dbf..28d2ef0 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1316,7 +1316,7 @@
 				- Physical prototype, (5 marks) (2019)
 				- Analytical prototype, (5 marks) (2019)
 				- Comprehensive prototype. (5 marks) (2019)
-			- ### Costs (2019)
+			- ### Costs (2019) Topic 11-12
 				- Component costs, (5 marks) (2019)
 				- Support costs, (5 marks) (2019)
 				- Indirect allocations as part of Overhead costs. (5 marks) (2019)