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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______。

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[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;

阅读下列材料，然后回答后面的问题。 “一幢裂开的房子是站不住的。我相信这个政府不能永远保持半奴隶半自由的状态。我不期望联邦分裂解散，我不希望房子倒塌，但我的确期望房子停止分裂。” 材料中“这个政府”指哪国的什么政府“这个政府”的“半奴隶半自由的状态”后来是怎么解决的

The energy problem is not merely a short-term crisis. Geologists 【1】 that 80 percent of all the oil 【2】 in the US will be used 【3】 before the year 2000. We might even come to the end of our coal reserves, abundant as they are, before another century is over. Americans have been 【4】 this situation suddenly. Many unprepared even to recognize 【5】 , and most of us are unprepared to meet it. We are unprepared 【6】 our habits and traditions, and our national life 【7】 based on a history of material abundance. With about 6 percent of the world’’s 【8】 ,we in the US 【9】 nearly 50 percent of the world’’s energy resources. Such resources within the us 【10】 are still ample by any standards except our own.

A. estimate
B. decide
C. guess
D. develop

一个作业从进入系统到运行结束，一般要经历______、“执行”和“完成”3个不同状态。