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 bc535cd7..d1e8f6ee 100644
--- a/备课组/26届/校本材料.json
+++ b/备课组/26届/校本材料.json
@@ -3424,6 +3424,47 @@
                 "023601"
             ],
             "remarks": ""
+        },
+        "G20260219": {
+            "id": "G20260219",
+            "name": "正弦函数的性质(1)",
+            "filename": "正弦函数的性质(1)",
+            "objects": [
+                "K0319001B",
+                "K0319002B",
+                "K0319003B",
+                "K0319004B",
+                "K0319005B"
+            ],
+            "basicknowledges": [
+                "B00159",
+                "B00160",
+                "B00161",
+                "B00162"
+            ],
+            "examples_basic": [
+                "018439",
+                "018440",
+                "018441"
+            ],
+            "work_inclass": [
+                "009595",
+                "009596",
+                "009597"
+            ],
+            "homework": [
+                "023602",
+                "021648",
+                "021650",
+                "021651",
+                "021652",
+                "018442",
+                "021657",
+                "010275",
+                "010284",
+                "010288"
+            ],
+            "remarks": ""
         }
     }
 }
\ No newline at end of file