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S1. According to the passage, a worker primarily works for_______________________.

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Passage OneQuestions 11 to 13 are based on the passage you have just heard.

A. Model clothes.
B. Informal clothes.
C. Expensive clothes.
D. Fashionable clothes.

CPU输入数据的速度远远高于打印机的打印速度，为解决这一矛盾，可采用______。

某虚拟存储器的用户空间共有32个页面，每页1KB，主存16KB。假定某时刻系统为用户的第0、1、2、3页分别分配的物理块号为5、10、4、7，那么虚地址为0A5C对应的物理地址是______。

[说明] 下面程序定义了一个类Point及其成员函数，然后从类Point派生出类Circle及其成员函数。 [Java程序] class Mainjava public static void main (String arg[]) Circle c=new Circle(2.5,3.7,4.3); System.out.println(" X coordinate is "+c.getX() +"\nRadius is: "+c.get Radius()); (1) ; //设置新的圆心(2，2) Point pRef=c; System.out.println("\n Circle printed as a point is : " +"["+ (2) +"."+ (3) +"]"): class Point protected double x,y; public Point (double a, double b) x = a; y = b;) void setPoint (double a, double b) x = a; y = b; final double getX () return x; final double getY () return y; class Circle (4) protected double radius; public Circle(double r, double a, double b) (5) ; radius=r ; void setRadius (double r) radius=r; final double getRadius () return radius; final double area () return 3.14159radiusradius;