bug fixes

src/modules/student/lab/views/Index.vue

@@ -284,9 +284,10 @@ function handleEmpty(name: string) {
           </el-tab-pane>
           <el-tab-pane label="理论试题" name="exam" v-if="!empty.includes('exam')">
             <Exam
-              :experiment_id="form.experiment_id"
               v-model="examURL"
+              :experiment_id="form.experiment_id"
               :examStatus="experimentInfo?.exam_status"
+              :showIframe="experimentInfo?.exam_status === 0"
               @empty="handleEmpty('exam')"></Exam>
           </el-tab-pane>
           <el-tab-pane label="实操试题" name="qa" v-if="!empty.includes('qa')">