类型bug修复

src/hooks/useOptions.ts

@@ -6,7 +6,7 @@ import type { Ref } from 'vue'
 
 export interface DataModel {
   subject?: string
-  question?: number | ''
+  question?: number
   group?: number
 }
 
@@ -135,7 +135,7 @@ const useOptions = (
         // changeModelValue('question')(void 0)
         // changeModelValue('group')(void 0)
         getMainQuestionList({ subjectCode: dataModel.subject })
-        dataModel.question = ''
+        dataModel.question = undefined
       }
     },
     { immediate: true }