static void Main(string[] args)
{
//One one = new One();
Dog dog = new Dog();
dog.Age = 10;
dog.Bite();
dog.GetAge();
dog.BiteMan();
//构造实例化: 先调用父类构造函数,在调用子类的构造函数
Dog dog2 = new Dog(10);
//默认先调用父类的默认构造函数, 在调用子类的特定构造函数
Animal dog3 = new Dog();
dog3.Bite(); //调用子类
dog3.BiteMan(); //调用父类
((Dog)dog3).BiteMan(); //调用父类
Console.ReadLine();
}