【简答题】The returns from a project are normally distributed with a mean of $800,000 and a standard deviation of $400,000. If the project returns less than $500,000, the company will be in financial difficulti...
【单选题】以下程序的运行结果是class Person{public Person(){System.out.println(“this is a Person”);}}public class Teacher extends Person{private String name=”tom”;public Teacher(){System.out.println(“this is a teacher”);s...