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				@@ -43,7 +43,7 @@ 
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				             inactive-text="生词模式" 
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				           /> --> 
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				         </div> 
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				-        <template v-if="category == 'oc' || !category"> 
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				+        <template v-if="category == 'OC' || !category"> 
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				           <Preview 
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				             v-if="chapterId && context" 
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				             ref="previewAnswer" 
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				@@ -181,7 +181,7 @@ export default { 
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				         this.themeColor = res.book_theme_color; 
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				         if (res.content) { 
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				           const _this = this; 
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				-          if (!this.category || this.category == "oc") { 
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				+          if (!this.category || this.category == "OC") { 
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				             _this.context = { 
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				               id: _this.chapterId, 
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				               ui_type: JSON.parse(res.content).question 
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