diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index efe8570..15fd4d0 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1371,17 +1371,15 @@
 								- Reading across a row reveals all of the tasks whose output is required to perform the task corresponding to the row.
 								- Reading down a column reveals which tasks receive information from the task corresponding to the column.
 								- The diagonal cells are usually filled in with dots or the task labels, simply to separate the upper and lower triangles of the matrix and to facilitate tracing dependencies.
-						- Gantt Chart
+						- Gantt Chart :->  shows how the work is broken down into a set of activities
 							- Features: #flashcard
 							  id:: 648adeaf-7e45-4525-b935-ef9a0357b961
-								- Gantt charts show how the work is broken down into a set of activities
 								- They show the scheduling of these activities as a series of horizontal bands against a series of vertical lines representing dates
 								- ![image.png](../assets/image_1686471844454_0.png)
 								- They can be used to show dependencies between activities
 								- They can be used to measure progress on a project or compare planned production with actual production
-						- PERT Charts #flashcard
+						- PERT Charts #flashcard :-> PERT (program evaluation and review technique) charts explicitly represent both dependencies and timing, in effect combining some of the information contained in the DSM and Gantt chart.
 						  id:: 648adeaf-d61b-4215-990a-77f4fa850314
-							- PERT (program evaluation and review technique) charts explicitly represent both dependencies and timing, in effect combining some of the information contained in the DSM and Gantt chart.
 							- ![image.png](../assets/image_1686471880938_0.png)
 						- The Critical Path #flashcard
 						  id:: 648adeaf-08be-4aa8-989a-f39a68c2e9a0