【单选题】下列程序 test 类中的变量 c 的最后结果为()。 P ublic class test { P ublic static void main (String args [ ] ){ I nt a=10; I nt b; I nt c; I f (a>50) { b =9; } c =b+a; } }
【简答题】Question 3 (a)Air tickets usually fall into three classes: top class, business class, and economy class. What is the economic rationale for this phenomenon? (b)What is price discrimination? Are there ...