diff --git a/备课组/26届/校本材料.json b/备课组/26届/校本材料.json
index ea4963a4..bc038171 100644
--- a/备课组/26届/校本材料.json
+++ b/备课组/26届/校本材料.json
@@ -3102,6 +3102,7 @@
             "filename": "余弦定理(2)",
             "objects": [
                 "K0308003B",
+                "K0308004B",
                 "K0316001B",
                 "K0316002B"
             ],