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				@@ -39,13 +39,13 @@ export function vaildPPTUrl() { 
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				   let returnUrl = '';
 
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				   if (/test/.test(url)) {
 
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				-    returnUrl = 'https://test.kt.colexiu.com';
 
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				+    returnUrl = 'https://test.kt.colexiu.com/classroom-ppt';
 
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				   } else if (/dev/.test(url)) {
 
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				-    returnUrl = 'https://dev.kt.colexiu.com';
 
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				+    returnUrl = 'https://dev.kt.colexiu.com/classroom-ppt';
 
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				   } else if (/localhost/.test(url)) {
 
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				     returnUrl = 'http://192.168.3.122:9527';
 
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				   } else {
 
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				-    returnUrl = 'https://mec.colexiu.com';
 
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				+    returnUrl = 'https://mec.colexiu.com/classroom-ppt';
 
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				   }
 
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				   return returnUrl;
 
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				 }
 
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