ui update for question list

back-ui/src/views/learn/questions/index.vue

@@ -11,7 +11,7 @@
             </el-form-item>
             <el-form-item label="类型" prop="qtpye">
                 <el-select v-model="queryParams.qtpye" clearable @change="handleQuery" style="width: 172px">
-                    <el-option v-for="t in qtpyeList" :label="t" :value="t" />
+                    <el-option v-for="t in qtpyeList" :label="t" :value="t"/>
                 </el-select>
             </el-form-item>
             <el-form-item label="科目" prop="subjectId">
@@ -20,13 +20,8 @@
                 </el-select>
             </el-form-item>
             <el-form-item label="知识点" prop="knowledgeId">
-                <el-cascader v-model="queryParams.knowledgeId" :options="knowledges" filterable clearable @change="handleQuery"></el-cascader>
-                <el-input
-                    v-model="queryParams.knowledgeId"
-                    placeholder="请输入知识点"
-                    clearable
-                    @keyup.enter="handleQuery"
-                />
+                <el-cascader v-model="queryParams.knowledgeId" :options="knowledges" filterable clearable
+                             @change="handleQuery"></el-cascader>
             </el-form-item>
             <el-form-item label="难度" prop="diff">
                 <el-input