义一个动物Animal类,包括动物类型type成员变量,一个叫声sound()方法,定义一个Animal类的子类Dog类,重写sound()方法;再定义一个Animal类的子类Cat类,重写sound()方法;定义测试TestAnimal类,声明创建Animal类对象,再分别创建一个Dog类、Cat类的对象,然后通过访问Animal对象来访问Dog、Cat类对象的sound()方法。

“Use<br/>the sound of a dog barking instead of a real dog as a burglar<br/>alarm”utilizes () of 40 invented principles. A: Extraction B: Feedback C: Continuity of useful action D: Beforehand cushioning

在上一填空题的基础上，我们定义Dog类的父类Animal。class Animal(object): def __init__(self, name): self.name = name def getInfo(self): print(This animals name:, self.name) def sound(self): print(The sound of this animal goes?)如果要继承该Animal类，前一填空题中的Dog类需要修改一行，需要修改第1 行，修改成___________________（注意书写完整），如果调用dog.sound () ，该方法是否可以运行？（如果可以，请填写输出；如果不可以，请填写字母F）____________。（两个答案之间用一个半角分号分隔）

In the historical development of language, sound change is inevitable, such as sound loss, sound a______ and sound movement.

对于下列Dog类，下列叙述错误的是：class Dog{ Dog(){ } Dog(int m){ } Dog(double m){ } int Dog(int m){ return m; }} A: Dog(int m)与Dog(double m)是重载的构造方法； B: Dog(int m)与int Dog(int m)是重载的构造方法； C: Dog d=new Dog();对象d创建时会调用Dog()构造方法； D: Dog d=new Dog(10);对象d创建时会调用Dog(int m)构造方法；

If someone asks about the "breed"of your dog, they want to know the ________________. A: age of the dog B: sex of the dog C: type of dog D: name of the dog

class Animal { public Animal() { System.out.println("Animal!"); } } public class Dog extends Animal{ public Dog() { System.out.println("Dog!"); } public static void main(String[] args) { Dog dog=new Dog(); } }

public class Dog(){...}下列哪个选项可以是Dog类的构造方法 A: public Dog(){ } B: public void Dog(){ } C: public dog(){ } D: public void dog(){ }

对于下列Dog类，哪个叙述是错误的？ class Dog { Dog(int m){ } Dog(double m){ } int Dog(int m){ return 23; } void Dog(double m){ } }

A sound mind is inseparable from a sound body. The word “sound” means______.