In Java,____must be declared before they can be used.在Java中,______必须在使用前定义。
A. Variables 变量
B. Literals 常量
C. Key words 关键字
D. Comments 注释
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The term______typically refers to the device that displays console output.该______通常是指显示控制台输出的设备
A. Standard output device 标准的输出设备
B. Central processing unit 中央处理单位
C. Secondary storage device 辅助存储设备
D. Liquid crystal display 液晶显示器
In Java, the beginning of a comment is marked with:在Java中,注释的开头标记为:
A. //
B. ""
C. ;
D.
A Java program must have at least one of these:一个Java程序必须至少具有以下之一:
A. Class definition 类定义
B. Variable 变量
Comment 注释
D. System.out.println(); statement(语句)
To compile a program named First, use the following command:要编译名为First的程序,使用一下命令:
A. java First.java
B. javac First
C. javac First.java
D. compile First.javac