【单选题】关于接口的定义和实现,以下描述正确的是:
B.
接口定义中的变量都必须写明final和static
C.
如果一个接口由多个类来实现,则这些类在实现该接口中的方法时采用统一的代码
D.
如果一个类实现了接口,则必须实现该接口中的所有方法,但方法可不为为public
【单选题】I have a lovely pet cat. __________ name is Lazy.
【单选题】My friend helped me _______ my cat when I was on vacation with my wife.
【单选题】My math teacher I was too lazy. [ ]
【单选题】My teacher said that I a lazy student,but I think I'm . [ ]