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发布时间:2023-12-02 18:29:18

[单项选择] 现有:  class Guy  {  String greet()  {  return "hi";  } } class Cowboy extends Guy  {  String greet()  {  return. "howdy";}}  class  Wrangler  extends  Cowboy  {  String  greet()  {  return  "orch!"; } }  class Greetings2  {  public  static void main (String  []  args)  {  Guy g=new Wrangler();  Guy g2=new Cowboy();  Wrangler w2=new Wrangler();  System. out .print (g.greet()+g2.greet()+w2 .greet());  }  }  结果是什么?()     
A.  hi hi ouch!
B.  ouch!  howdy  ouch!
C.  hi howdy ouch!
D. 编译失败
E. 运行的咐候有异常抛出

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[单项选择] 现有:  String s="write a line to a file";     w.print(s+"/n");      哪一个是对的?() 
A. w即可以是PrintWriter类型,也可以足BufferedWriter类型。
B. w即不可以是PrintWriter类型,也不可以足BufferedWriter类型。
C. w可以是BufferedWriter类型,但不可以是PrintWriter类型。
D.  w以是PrintWriter类型,但不可以是BufferedWriter类型。
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B.  south         east 
C.  south to north     east to west    
D.  south to north      east    
E.  south     east to west
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B. It prevents character set translation on import.
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