【单选题】下面成运行的结果是 abstract class A { public abstract void printStr(string str); } class B : A { public override void printStr(string str) { str = str + "override"; Console.WriteLine(str); } } class Program { ...
【单选题】下面成运行的结果是 abstract class A { public abstract void printStr(string str); } class B : A {public override void printStr(string str) { str = str + "override";Console.WriteLine(str); }static void Main(stri...