阅读下面的代码,编译后会生成几层 package cn.edu.dlvtc.mypack; class Demo1{ public static void main(String [] args) { System.out.println("Hello package!"); } }
A.
一层包(cn)
B.
二层包(cn.edu)
C.
三层包(cn.edu.dlvtc)
D.
四层包(cn.edu.dlvtc.mypack)
E.
五层包(cn.edu.dlvtc.mypack.Demo1)
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参考答案:
举一反三
【多选题】Match the following technologies or products with the related manufacturers or institutes. There are more matches than manufacturers so you will not use them all. [*] Answer Choices
A.
the Global Positional System (GPS).
B.
diagnostic safety check system.
C.
battery-powered sensor.
D.
ski-brakes with an electric current from the bottom.