701J/JA与704J/JA，901J/JA与906J/JA为何要设联通管？

被评估设备的设计总使用年限为12年，现已使用5年，该设备的实际使用强度超过了正常使用强度50%，该设备的尚可使用年限应为( )。

A．7年

B．9.5年

C．4.5年

D．5年

Luckily, the old man was sent to the hospital in time. Three minutes later and he _______.

A．would die

B．was to die

C．should have died

D．would have died

社区诊断的内容包括（）。

A.社区人口学诊断

B.流行病学诊断

C.行为和环境诊断

D.教育学诊断

E.管理和政策诊断

阅读以下说明和Java程序，将应填入 (n) 处的字句写在对应栏内
[说明]
以下程序的功能时三角形、矩形和正方形的面积输出。
程序由5个类组成：areatest是主类，类Triangle，Rectangle和Square分别表示三角形、矩形和正方形，抽象类Figure提供了一个计算面积的抽象方法。
[Java程序]
public class areatest
public static viod main(string args[])
Figure[]Figures=
New triangle(2,3,3),new rectangle(5,8),new square(5)
;
for(int i=0; i＜Figures.length;i++)
system.out.println(Figures+"area="+Figures.getarea());



public abstract class figure
public abstract double getarea();

public class rectangle extends (1)
double height;
double width;
public rectangle (double height,double width)
this.height=height;
this.width=width;

public string tostring()
return"rectangle:height="+height+",width="+width+":";

public double getarea()
return (2)


public class square exends (3)

public square(double width)
(4) ;

public string tostring()
return"square:width="+width":";


public class triangle entends (5)

double la;
double lb;
double lc;
public triangle(double la,double lb,double lc)
this.la=la;this.lb=lb;this.lc=lc;

public string tostring()(
return"triangle:sides="+la+","+lb+","+lc+":";

public double get area()
double s=(la+lb+lc)/2.0;
return math．sqrt(s^*(s-l

• a)^*(s-l
• b)^*(s-l
• c));
  
  

The development of e-commerce may well bring the world into a brand new era of "electronic currency". At the moment, (52) areas in Europe, the United States and Asia have already started studying the possibility of an electronic currency. Electronic currency is not only about currency. It (53) to an entire finance system on the Net. It includes a virtual numeric currency, an electronic system of withdrawals, transfers and loans, and (54) cards of all shapes and sizes. The (55) of an electronic currency system implies the emergence of "virtual banks" and "virtual enterprises". Actually, the first virtual bank appeared in the US in 1995. (56) it is a small and insignificant bank, it represents the trend of the future. In time to come, we may even have to (57) the familiar paper currency.

As the Net pushes the economy (58) rapidly, the economy is also bringing the Net market forward, resulting in the Internet itself becoming the world’s largest emerging market. Of course, this is just the beginning. Although there are many companies which made huge profits (59) in the Internet market, they tend to be small companies. To date, most companies are making losses. The competition in the knowledge-based economy will also be more (60) This will definitely promote (61) and more efficient cooperation.

60().

A.competent 

B.intense 

C.comparative 

D.interior