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【单选题】
编译及运行以下代码,下列选项哪个是正确的 public class Conv{ public static void main(String argv[]){ Conv c=new Conv(); String s=new String("ello"); c.amethod(s); } public void amethod(String s){ char c='H'; c+=s; System.out.println(c); } }A.
编译成功，输出字符串"Hello"
B.
编译成功，输出字符串"ello"
C.
编译失败
D.
编译成功，输出字符串"elloH"
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A.
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A.
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B.
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C.
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D.
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