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【单选题】
即时通讯是指A.
通过语音通话来实现沟通的服务
B.
能够即时发送和接收互联网上消息的服务
C.
通过视频通话来实现沟通的服务
D.
对图片和数据的存储转发并且反馈有延时的技术服务
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反馈参考答案：
举一反三
【简答题】下列程序的运行结果是 ( ) class Shape{ public Shape(){ System.out.print("S"); } } class Circle extends Shape{ public Circle(){ System.out.print("C"); } public Circle(double r){ this(); System.out.print(r); } } p...
【判断题】There are four teams in British Parliamentary debate, that is, opening government, closing government, opening oppostion and closing opposition.
A.
正确
B.
错误
【单选题】给定如下代码,要在第三个构造方法的空白处填上一行代码使之能够调用第二个构造方法,这行代码应该是() class Circle{ String name,radius; int r; public Circle(String n){ name=n; } public Circle(String n,int a){ name=n; r=a; } public Circle(String n,Strin...
A.
this(name,a);
B.
this(Circle(n,a));
C.
this(n,a);
D.
Circle(n,a);
【简答题】完形填空。 Mr. King is my father's friend. He has some 1 trees in his garden. He 2 them carefully. Now 3 many apples on the trees and Mr. King is very happy. One afternoon when he looked out of the window,...
【判断题】In “FLTRP Cup” English Debating Competition, there are four teams on the stage, with two debaters on each team.
A.
正确
B.
错误
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