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多項選擇題

現(xiàn)有: 
class Flow { 
public static void main(String [] args)  
try { 
System. out .print ("before") ;  
doRiskyThing ( )  ;  
System.out.print ("after ") ;  
} catch (Exception fe) { 
System.out.print ("catch") ;  
} 
System. out .println ( " done") ; 
} 
public static void doRiskyThing() throws Exception{  
// this code returns unless it throws an Exception           }} 
可能會產(chǎn)生哪兩項結(jié)果 ?()  

A. before catch
B. before after done
C. before catch done
D. before after catch

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