Use PICO model to design a research question about your interested topic or phenomenon. Descibe the topic or phenomenon. Design a question following PICO model.
【单选题】阅读下列程序: public class Threadiest{ public static void main(String args[{ PrintWords p = new PrintWords(); Thread t = new Thread( p ); t.start(); p.run(2); } } class PrintWords implements Runnable{ int i...