【判断题】当基于已有类创建子类的时候,已有类称为父类或基类,这个新类称为子类或派生类。When subclasses are created based on existing classes, existing classes are called parent classes or base classes, and this new class is called subclasses or deri...
【简答题】按要求完成句子,每空一词。 1.He has a ping-pong bat.(改为否定句) He______ ________a ping-pong bat. 2.Jim plays basketball every afternoon.(改为一般疑问句) ________ Jim_______ basketball every afternoon? 3.Does your brother h...