import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int m = in.nextInt(); while (m-- > 0) { double x0 = in.nextDouble(); double y0 = in.nextDouble(); double z0 = in.nextDouble(); double x...