【简答题】A.She will talk to Judy about the problems. B.She isn't sure if Judy can solve the problems. C.She may not be able to help the man with the problems. D.The man should learn to solve the problems by hi...
【单选题】给定如图所示的车辆类 Vehicle 和可驾驶的 Drivable 接口之间的关系: 有关类和接口定义的代码如下: public intece Drivable{ } public class Vehicle{ } public class Car extends Vehicle implements Drivable{ } public class Truck extends Vehicl...
A.
Car car = new Car(); Vehicle vehicle = car;
B.
Tank tank = new Tank(); Vehicle vehicle = tank;
C.
Drivable drivable = new Tank(); Object o = drivable;
D.
Vehicle vehicle = new Vehicle(); Object o = vehicle;