diff --git a/题库0.3/Problems.json b/题库0.3/Problems.json
index f5dc22e9..147964fd 100644
--- a/题库0.3/Problems.json
+++ b/题库0.3/Problems.json
@@ -591297,7 +591297,7 @@
             "第五单元"
         ],
         "genre": "解答题",
-        "ans": "$\\overrightarrow{DC}=\\dfrac{1}{2}\\overrightarrow{a}$;\\\\ $\\overrightarrow{DC}=-\\dfrac{1}{2}\\overrightarrow{a}+\\overrightarrow{b}$;\\\\\n$\\overrightarrow{MN}=-\\dfrac{1}{4}\\overrightarrow{a}-\\overrightarrow{b}$.",
+        "ans": "$\\overrightarrow{DC}=\\dfrac{1}{2}\\overrightarrow{a}$;\\\\ $\\overrightarrow{BC}=-\\dfrac{1}{2}\\overrightarrow{a}+\\overrightarrow{b}$;\\\\\n$\\overrightarrow{MN}=\\dfrac{1}{4}\\overrightarrow{a}-\\overrightarrow{b}$.",
         "solution": "",
         "duration": -1,
         "usages": [
@@ -591312,7 +591312,8 @@
         ],
         "origin": "2025届高一下校本作业",
         "edit": [
-            "20230209\t王伟叶"
+            "20230209\t王伟叶",
+            "20240215\t王伟叶"
         ],
         "same": [],
         "related": [],