classCatextendsAnimal{}对于下述代码说法正确的是()A、Cat是Animal的子类B、Animal是Cat的子类C、Cat是Animal的超类D、Animal一定是抽象类

classCatextendsAnimal{}对于下述代码说法正确的是()

  • A、Cat是Animal的子类
  • B、Animal是Cat的子类
  • C、Cat是Animal的超类
  • D、Animal一定是抽象类

相关考题:

有如下程序: include using namespaee std;class Animal{ public: virtual char*g 有如下程序:include<iostream>using namespaee std;c lass Animal{public:virtual char*getType( )const{return"Animal";}virtual char*getVoice( )const{return"Voice";}};class Dog:public Animal{public:char*getType( )const{return"Dog";}char*getVoice( )eonst{return"Woof";}};void type(AnimalA) {cout<<a.getType( );}void speak(Animal A) {eout<<a.getVoice( );}int main( ){Dog d;type(D) ;cout<<"speak";speak(D) ;cout return 0;}程序的输出结果是______。

下列程序片段中,能通过编译的是A.public abstract class Animal{ public void speak();}B.public abstract class Animal{ public void speak(){}}C.public class Animal{ public abstract void speak();}D.public abstract class Animal{ public abstract void speak(){}}

( 12 )有如下程序:#include iostreamusing namespace stdclass Animal{public:virtual char* getType () const { return "Animal" ; }virtual char* getVoice () const { return "Voice" ; }};Class Dog : public Animal {public:char* getType ( ) const {return "Dog" ; }char* getVoice ( ) const {return "Woof"}};void type ( Animal a ) {couta.getType ( ) ; }void speak ( Animal a ) {couta.getVoice ( ) ; }int main ( ) {Dog d; type ( d ) ; cout" speak" ; speak ( d ) ; coutendi;return 0;}运行时的输出结果是【 12 】 。

It can be inferred from the passage that all of the following are ways of producing new strains of influenza viruses EXCEPT______.A. two influenza viruses in the same animal recombiningB. animal viruses recombining with human virusesC. two animal viruses recombining in one animalD. two animal viruses recombining in a human

若Animal是Cat,Dog的父类,则下列选项中,正确的是()。 A.Animalanimal=newCat()B.Catcat=(Cat)newDog()C.Catcat=(Cat)newAnimal()D.Animalanimal=newDog()

以下关于C#代码的说法正确的是()publicabstractclassAnimal{publicabstractvoidEat();publicvoidSleep(){}}A、代码编译错误,因为类中方法没有实现B、代码编译错误,因为类中存在非抽象方法C、该段代码正确D、通过代码”Animalan=newAnimal();”可以创建一个Animal对象

classAnimal{AnimalgetOne(){returnnewAnimal();}}classDogextendsAnimal{//insertcodehere}classAnimalTest{publicstaticvoidmain(String[]args){Animal[]animal={newAnimal(),newDog()};for(Animala:animal){Animalx=a.getOne();}}}和代码:3a.DoggetOne(){returnnewDog();}3b.AnimalgetOne(){returnnewDog();}第3行中插入的哪项编译且运行无异常?A.3a行或3b行B.既非3a,也非3bC.3a行D.3b行

11.classAnimal{publicStringnoise(){returnpeep”;}}12.classDogextendsAnimal{13.publicStringnoise(){returnbark”;}14.}15.classCatextendsAnimal{16.publicStringnoise(){returnmeow”;}17.}.....30.Animalanimal=newDog();31.Catcat=(Cat)animal;32.System.out.printIn(cat.noise());Whatistheresult?()A.peepB.barkC.meowD.Compilationfails.E.Anexceptionisthrownatruntime.

dog是animal的子类,下面代码错误的是_________。 A.Objecto=newDog();B.Animala=newDog();C.Objectd=(Dog)newAnimal()D.Animala=(Animal)newDog();

下列程序片段中,能通过编译的是( )。 A.public abstract class Animal{ public void speak;}S 下列程序片段中,能通过编译的是( )。A.public abstract class Animal{ public void speak;}B.public abstract class Animal{ public void speak{);}C.public class Animal{ pubilc abstract void speak;}D.public abstract class Animal{ pubile abstract void speak{};}

假定在窗体(名称为Form1)的代码窗口中定义如下记录类型:Private Type animalAnimalName As String*20AColor As String*10End Type在窗体上画一个名称为Command1的命令按钮,然后编写如下事件过程:Private Sub Command1_Click()Dim rec As animalOpen "c:\vbTest.dat" For Random As #1 Len = Len(rec) rec.animalName = "Cat" rec.aColor = "White" Put #1, , recClose #1End Sub则以下叙述中正确的是( )。A.记录类型animal不能在Form1中定义,必须在标准模块中定义B.如果文件c:\vbTest.dat不存在,则Open命令执行失败C.由于Put命令中没有指明记录号,因此每次都把记录写到文件的末尾D.语句“Put #1, , rec”将animal类型的两个数据元素写到文件中

材料题DWith the large number of dogs roaring through our communities,people need to know the facts about rabies(狂犬病),a fatal disease caused by animal bites.Despite vaccination(接種疫苗)programs,rabies is still very prevalent,and will continue to be a serious public health problem for many years to come.Rabies strikes the central nervous system and brings on choking,convulsions(抽搐)and inability to swallow liquids.It can even cause death.If you or anyone in your family is bitten by dog,cat or other animal,you should not panic,but thoroughly wash the wound with plenty of soap and water and rush to nearby hospital for immediate treatment.If you own the animal which did the biting,you should immediately call a veterinarian for advice and make sure the public health authorities know when and where the biting took place and who was bitten.()Rabies is a kind of disease which________.Which is the best title of the passage A.What a Rabies B.The Horrible RabiesC.What Are Animal Bites D.How to Control Rabies

Animal is a super-ordinate term, while cow, horse, pig, dog, cat, etc. are().

在Java中,类Animal中的方法printA()定义如下:  public void printA() {    Int a=10;    Int result =10%3;    System.out.println(result); }  在类Dog中方法printA()定义如下:  public void printA() {   Int a=10;    System.out.println(a/3); }  Dog类的定义如下:  Class Dog extends Animal{…}.  Animal animal=new Dog();  animal.printA();  以上语句输出结果为()。 A、 0B、 1C、 2D、3E、3.3333

10. interface Jumper { public void jump(); }  ......  20. class Animal {}  ......  30. class Dog extends Animal { 31. Tail tail; 32. }  ......  40. class Beagle extends Dog implements Jumper {  41. public void jump() { }  42. }  .......  50. class Cat implements Jumper {  51. public void jump() { }  52. }  Which three are true?()A、 Cat is-a AnimalB、 Cat is-a JumperC、 Dog is-a AnimalD、 Dog is-a JumperE、 Cat has-a AnimalF、 Beagle has-a TailG、 Beagle has-a Jumper

class Animal{ Animal getOne(){return new Animal();}}   class Dog extends Animal{   //insert code here   }   class AnimalTest{   public static void main(String[] args){   Animal[] animal={ new Animal(), new Dog()};   for(Animal a:animal){   Animal x= a.getOne();   }   }   }   和代码:   3a.Dog getOne() { return new Dog();}   3b.Animal getOne() { return new Dog();}   第3行中插入的哪项编译且运行无异常?  A、3a行或3b行B、既非3a,也非3bC、3a行D、3b行

interface Animal {  void soundOff();  }  class Elephant implements Animal {  public void soundOff() {  System.out.println(“Trumpet”);  }  }  class Lion implements Animal {  public void soundOff() { System.out.println(“Roar”);  }  }  class Alpha1 {  static Animal get( String choice ) {  if ( choice.equalsIgnoreCase( “meat eater” )) {  return new Lion();  } else {  return new Elephant();  }  }  }  Which compiles?()  A、 new Animal().soundOff();B、 Elephant e = new Alpha1();C、 Lion 1 = Alpha.get(“meat eater”);D、 new Alpha1().get(“veggie”).soundOff();

publicabstractclassAnimal{publicabstractvoidEat();publicvoidSleep(){}}以下关于C#代码地描述正确的是()。A、该段代码正确B、代码错误〃因为类中存在非抽象方法C、代码错误〃因为类中方法没有实现D、通过代码Animalan=newAnimal;可以创建一个Animal对象

11. class Animal { public String noise() { return “peep”; } }  12. class Dog extends Animal {  13. public String noise() { return “bark”; }  14. }  15. class Cat extends Animal {  16. public String noise() { return “meow”; }  17. }  .....  30. Animal animal = new Dog();  31. Cat cat = (Cat)animal;  32. System.out.printIn(cat.noise());  What is the result?() A、 peepB、 barkC、 meowD、 Compilation fails.E、 An exception is thrown at runtime.

现有:  interface Animal {       void eat () ;       }       //insert code here       public class HouseCat extends Feline {       public void eat() { }       }  和五个申明  abstract class Feline implements Animal { }  abstract  class  Feline  implements  Animal  {  void eat () ;  }  abstract class Feline implements Animal { public void eat();}  abstract class Feline implements Animal { public void eat() {}  }  abstract class Feline implements Animal { abstract public void eat();} 结果为:()      A、1B、2C、3D、4

1. class Animal { Animal getOne() { return new Animal(); } }  2. class Dog extends Animal {  3. // insert code here   4. }  5.  6. class AnimalTest {  7. public static void main(String [] args) {  8. Animal [] animal = { new Animal(), new Dog() } ;  9. for( Animal a : animal) {  10. Animal x = a.getOne();  11. }  12. }  13. }  和代码:  3a. Dog getOne() {  return new Dog();  }  3b. Animal getOne() {  return new Dog();  }  第 3 行中插入的哪项将编译且运行无异常?() A、3a行B、3b行C、3a行或3b行D、既非3a,也非3b

现有:  1. interface Animal {  2. void eat();  3. }  4.  5. // insert code here  6.  7. public class HouseCat extends Feline {  8. public void eat() { }  9. }   和五个声明:  abstract class Feline implements Animal { }  abstract class Feline implements Animal { void eat(); }  abstract class Feline implements Animal { public void eat(); }  abstract class Feline implements Animal { public void eat() { } }  abstract class Feline implements Animal { abstract public void eat(); }  分别插入到第5行,有几个可以通过编译?() A、0B、1C、2D、3

多选题Given: 10. interface Jumper { public void jump(); } ...   20. class Animal {} ...   30. class Dog extends Animal {   31. Tail tail;   32. }   ...   40. class Beagle extends Dog implements Jumper{   41. public void jump() {}  42. }   ...   50. class Cat implements Jumper{   51. public void jump() {}   52. }. Which three are true?()ACat is-a JumperBCat is-a AnimalCDog is-a JumperDDog is-a AnimalEBeagle has-a JumperFCat has-a AnimalGBeagle has-a Tail

单选题publicabstractclassAnimal{publicabstractvoidEat();publicvoidSleep(){}}以下关于C#代码地描述正确的是()。A该段代码正确B代码错误〃因为类中存在非抽象方法C代码错误〃因为类中方法没有实现D通过代码Animalan=newAnimal;可以创建一个Animal对象

填空题Animal is a super-ordinate term, while cow, horse, pig, dog, cat, etc. are().

单选题11. class Animal { public String noise() { return “peep”; } }  12. class Dog extends Animal {  13. public String noise() { return “bark”; }  14. }  15. class Cat extends Animal {  16. public String noise() { return “meow”; }  17. }  .....  30. Animal animal = new Dog();  31. Cat cat = (Cat)animal;  32. System.out.printIn(cat.noise());  What is the result?()A peepB barkC meowD Compilation fails.E An exception is thrown at runtime.

多选题10. interface Jumper { public void jump(); }  ......  20. class Animal {}  ......  30. class Dog extends Animal { 31. Tail tail; 32. }  ......  40. class Beagle extends Dog implements Jumper {  41. public void jump() { }  42. }  .......  50. class Cat implements Jumper {  51. public void jump() { }  52. }  Which three are true?()ACat is-a AnimalBCat is-a JumperCDog is-a AnimalDDog is-a JumperECat has-a AnimalFBeagle has-a TailGBeagle has-a Jumper