下列程序运行后的结果是哪项?() class TestApp{ public static void main (String[] args){ int x=5; switch (x){ case 1: case 2: case 3: System.out.println("一季度"); break; case 4: case 5: case 6: System.out.println("二季度"); break; default: System.out.println("三季度"); break; } } }