question content wrap style update

src/components/MxPaper/mx-question-content.vue

@@ -1,6 +1,6 @@
 <template>
   <div class="fx-column" :id="'question_'+question.questionId">
-    <div v-html="questionWithSeq" class="answer fx-row"></div>
+    <div v-html="questionWithSeq" class="answer"></div>
     <div class="fx-column mt30 pl20 pr20">
       <!-- 递归，支持子题 -->
       <template v-if="question['subQuestions']">