Animal-driven chain pump, water-driven chain pump and wind-driven chain pump are different in structure.

下列各种java类的定义，那种是错误的 A: class Animal{}class Dog extends Animal {} B: final class Animal{}class Dog extends Animal{} C: abstract class Animal{}class Dog extends Animal{} D: public class Animal{}class Dog extends Animal{}

Depending on the power sources, pumps used in hydraulic system are divided into engine driven pump, electrically driven pump and hand pump.

Which animal is not the animal in Chinese Zodiac?

Job hunting outside of academia is driven by _______.

If we ______ in turn, you wouldn't have been so tired. A: drive B: drove C: had driven D: have driven

I at 130 kilometers per hours when the policeman stopped me. A: had driven B: have driven C: drive D: was driving

若Animal是Cat,Dog的父类，则下列选项中，正确的是（） A: Animal animal = new Cat(); B: Cat cat = (Cat)new Animal(); C: Animal animal = new Dog(); D: Cat cat = (Cat)new Dog();

若Animal是Cat,Dog的父类，则下列选项中，正确的是（） A: Animal animal = new Cat(); B: Animal a = new Cat(); Cat cat = (Cat) a; C: Animal animal = new Dog(); D: Cat cat = (Cat)new Dog();

Only 2 of the 38 passengers survived the accident. If only the driver _____ more carefully. A: drove B: had driven C: drives D: has driven