一公共汽车起点站每5分钟一趟车,一小时要发出多少辆公共汽车( )
A.12
B.13
C.28
D.30
参考答案:B
【代码6-1】 class Circle (1) private (2) pxc; public Circle()pxc=new (3) ; public void display()pxc. (4) ; 【代码6-2】 public class Factory public (5) getShapeInstance(int type) //生成特定类实例 switch(type) case 0: return new Point ( ); case 1: return new Rectangle ( ) ; case 2: return new Line ( ) ; case 3: return new Circle ( ) ; default: return null; public class App public static void main (String argv[] ) if (argv. length != l) System. out.println ("error parameters !"); return; inttype= (new Integer (argv[0])) .intValue ( Factory factory = new Factory ( ) ; Shape s; s=factory, (6) if (s==null) System.out.println ( "Error get instance !" ) return; s.display () ; return;
流脑表现为()
A.高热、头痛、皮肤黏膜瘀斑、脑膜刺激征
B.高热、惊厥、循环衰竭、呼吸衰竭
C.头痛、腰痛、眼眶痛
D.眼红、腿痛、淋巴结肿大
E.高热、相对缓脉、脾大