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															@@ -99,7 +99,7 @@ export default { 
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															   components: { 
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															   components: { 
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															     chatArea, 
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															     chatArea, 
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															     messageArea, 
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															     messageArea, 
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															-    sharePdf 
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															+    sharePdf, 
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															 		addNewCourseDialog 
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															 		addNewCourseDialog 
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															   }, 
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															   }, 
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															   data() { 
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															   data() { 
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															@@ -297,9 +297,11 @@ export default { 
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															   width: 20px; 
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															   width: 20px; 
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															   height: 20px; 
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															   height: 20px; 
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															   position: relative; 
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															   position: relative; 
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															-  background: url("../../../assets/icon/classroomObservation/Zkicon.png") 
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															+  background: url("../../../assets/icon/classroomObservation/close.png") 
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															     no-repeat; 
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															     no-repeat; 
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															-  background-size: 100% 100%; 
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															+	transform: rotate(45deg); 
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															+	cursor: pointer; 
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															+		background-size: 100% 100%; 
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															 } 
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															 } 
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															 .co-h2-l-hr { 
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															 .co-h2-l-hr { 
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															   width: 2px; 
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															   width: 2px; 
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