class Bird ｛ static void talk（） ｛ System.out.print（"chirp "）； ｝ ｝ class Parrot extends Bird ｛ static void talk（） ｛ System.out.print（"hello "）； ｝ public static void main（String [] args） ｛ Bird [] birds ＝ ｛new Bird（）， new Parrot（）｝； for（ Bird b ： birds） b.talk（）； ｝ ｝ 结果为：（） A、chirp chirpB、chirp helloC、hello helloD、编译失败
class Bird ｛ static void talk（） ｛ System.out.print（"chirp "）； ｝ ｝ class Parrot extends Bird ｛ static void talk（） ｛ System.out.print（"hello "）； ｝ public static void main（String [] args） ｛ Bird [] birds ＝ ｛new Bird（）， new Parrot（）｝； for（ Bird b ： birds） b.talk（）； ｝ ｝ 结果为：（）
- A、chirp chirp
- B、chirp hello
- C、hello hello
- D、编译失败
相关考题：
What does"a bird's-eye view"mean?A． See a view with a bird' s eyes.B． A bird looks at a beautiful view.C． It is a general view from a high position.D． If is a scenic place.
An individual bird can ________ the call of its own species. A.indicateB.differC.realizeD.identify
The best solution to the problem of the spread of bird flu is ______.A. to kill all the birds in an area where bird flu has been discoveredB. to kill all the chickensC. to kill all the birdsD. to kill all the chickens when bird flu has been discovered
The passage deals with all the following aspects bird flu EXCEPT _______.A. the origin and history of bird fluB. the importance of international cooperationC. the possible dangers of a national outbreakD. the significance of preventing it from spreading
Passage Four There was once a man in South America who had a parrot (鹦鹉), a pet bird that could imitate (模拟), human speech. The parrot was unique. There was no other bird like him in the whole world. He could learn to say any word except one. He could not say the name of his native town, Cotano. The man did everything he could to teach the parrot to say “Cotono” but he never succeeded. At first he was very gentle with the bird, but gradually he lost his temper, “You stupid bird! Why can’t you learn to say that One word! Say ‘Cotano’ or I’ll kill you!” But the parrot would not say it. Many times , the man screamed (大声叫), “Say ‘Cotano’ or I’ll kill you!” But the bird would never repeat the name. Finally the man gave up. He picked up the parrot and threw him into the chicken house. “You are even more stupid than the chickens!” In the chicken house, there were four old chickens waiting to be killed for Sunday’s dinner. The next morning, when he went out to the chicken house, the man opened the door. He was shocked by what he saw. He could not believe his eyes and ears. On the floor lay three dead chickens, the parrot was screaming at the fourth, “Say ‘Cotono’ or I’ll kill you!”(1).Why couldn’t the parrot say the name of his native town?A.Because it was stupid.B.Because it didn’t want to liveC.Because the man didn’t teach it how to say.D.The reason is not mentioned in the story.(2).Why did the man lose his temper?A.Because the bird couldn’t repeat his master’s name.B.Because the bird screamed all day long.C.Because the bird uttered the wrong word.D.Because the bird failed to say the name of the town.(3).Who killed the three chickens?A.The cruel masterB.The man in the kitchenC.The pet birdD.The fourth chicken(4).Why was the man shocked at the scene the next morning?A.The bird had finally understood his threat.B.The bird managed to escape from the chicken house.C.The bird had learned to scream back to him.D.The bird was living peacefully with the chicken.(5).Which of the following is NOT true according to the passage?A.The man loved his parrot very much and always treated it kindly.B.The parrot could imitate a lot of human languages.C.The parrot was thrown into the chicken house by its master.D.Three of the old chickens were dead the next day.
下面程序输出的结果为 #include"iostream．h" class A { public： A(){cout＜＜"CLASSA"＜＜endl；} ～A() {} }; class B：public A { public： B(){cout＜＜"CLASSB"＜＜endl；} ～B() {} }； void main() { A * p； p=new B； B *q； q=new B； }A．CLASS A CLASS BB．CLASS A CLASS B CLASS BC．CLASS A CLASS B CLASS A CLASS BD．CLASS A CLASS B CLASS B CLASS B
下面程序输出的结果为#include"iostream.h"class A{public：A( ){cout＜＜"CLASS A"＜＜endl；}～A( ){}}；class B：public A{public：B( ){cout＜＜"CLASS B"＜＜endl；}～B( ){}}；void main( ){A*p；p=new B；B *q；q=new B；}A．CLASS A CLASS BB．CLASS A CLASS B CLASS BC．CLASS A CLASS B CLASS A CLASS BD．CLASS A CLASS B CLASS B CLASS B
下列程序中的this指针的作用是【 】。include class Sample{int n;static int st;publ 下列程序中的this指针的作用是【 】。include ＜iostream. h＞class Sample{int n;static int st;public,Sample() {}Sample(int m) {n=m; st=m+10;}void Change(int k) {st=st+k;}void AddValue(int m){Sample s,s. n=n+m;*this=s;}void disp( ) {cout＜＜"n="＜＜n＜＜";st="＜＜st＜＜end1;}};int Sample: :st=0void main(){Sample s1(10),s2(10)s1.disp()s1.AddValue(5),s2.Change(100);s1.disp();s2.disp()}
下面程序输出的结果为 #include"iostream.h” class A ｛ public: A()｛cout＜＜"CLASSA"＜＜endl;｝ ～A() ｛｝ ｝; class B:public A ｛ public: B()｛cout＜＜"CLASS B"＜＜endl;｝ ～B()｛｝ ｝; void main() ｛ A*p; p＝new B;A．CLASS A CLASS B CLASS B CLASS BB．CLASS A CLASS B CLASS A CLASS BC．CLASS A CLASS B CLASS BD．CLASS A CLASS B
下面程序输出的结果为( )。 #inClUde”iostream.h” Class A {public： A(){cout＜＜“CLASS A”＜＜endl；} ～A()＜)}； class B：public A {public： B(){cout＜＜”CLASSB”＜＜endl；} ～B(){}}； void main() {A*p； p＝new B； B *q； q＝new B；}A．CLASS A CLASS BB．CLASS A CLASS B CLASS BC．CLASS A ClASS BD．CLASS A CLASS B CLASS A CLASS B CLASS B CLASS B
对于下面( )类定义,可以通过“newJ_Class()”生成类J_Class的实例对象。A、publicclassJ_Class{publicJ_Class(void){}}B、publicclassJ_Class{}C、publicclassJ_Class{publicJ_Class(Strings){}}D、publicclassJ_Class{publicvoidJ_Class(){}publicJ_Class(Strings){}
代码：.st1215 {font-family："宋体"；font-size：12px；line-height：1.5；}使用了“类”来设置文字样式，在页面中引用该样式的命令语句为（）A、class=st1215B、class=.st1215C、id=st1215D、id=#st1215
现有： class Bird { void talk（） { System.out.print（"chirp "）； } } class Parrot2 extends Bird { protected void talk（） { System.out.print（"hello "）； public static void main（String [] args） { Bird [] birds = {new Bird（）， new Parrot2 （） }； for（ Bird b ： birds） b.talk （） ； } } 结果是什么 ？（） A、 chirp chirpB、 hello helloC、 chirp helloD、编译错误
Which of the following class addresses is reserved for multicast？（）A、 Class AB、 Class BC、 Class CD、 Class D
What produces a compiler error？（） A、 class A { public A（int x） {} }B、 class A {} class B extends A { B（） {} }C、 class A { A（） {} } class B { public B（） {} }D、 class Z { public Z（int） {} } class A extends Z {}
单选题This rare bird has become（）Aan endangered specieBendangered speciesCendangering speciesDan endangered species
单选题What happened that morning according to this passage?AThe Frenchman was hit by the cage.BHis friend was hurt by the bird.CThe bird was hurt by the Frenchman.
单选题class Bird ｛ static void talk（） ｛ System.out.print（"chirp "）； ｝ ｝ class Parrot extends Bird ｛ static void talk（） ｛ System.out.print（"hello "）； ｝ public static void main（String [] args） ｛ Bird [] birds ＝ ｛new Bird（）， new Parrot（）｝； for（ Bird b ： birds） b.talk（）； ｝ ｝ 结果为：（）Achirp chirpBchirp helloChello helloD编译失败
单选题现有： class Bird { void talk（） { System.out.print（"chirp "）； } } class Parrot2 extends Bird { protected void talk（） { System.out.print（"hello "）； public static void main（String [] args） { Bird [] birds = {new Bird（）， new Parrot2 （） }； for（ Bird b ： birds） b.talk （） ； } } 结果是什么 ？（）A chirp chirpB hello helloC chirp helloD编译错误
单选题AThe bird bad finally understood his threat.BThe bird managed to escape from the chicken house.CThe bird had learned to scream back at him.DThe bird was living peacefully with the chickens.