如果某事件A发生的概率是0.2，那么下列哪个选项描述了事件A不发生的概率？

在高级数论中，莫比乌斯反演主要用于解决什么类型的问题？

Which of the following is a prediction Democrats have about the rising generation of voters?

Which of the following words means 'not able to read or write'?

假设有如下Java类结构： ```java class Base { public void method() { System.out.println("Base method"); } } class Derived extends Base { public void method() { System.out.println("Derived method"); } public void method(int i) { System.out.println("Derived method with int"); } } public class Main { public static void main(String[] args) { Base b = new Derived(); b.method(1); } } ``` 以上代码运行时会发生什么？