竞争就是不择手段地争取胜利。

The physicians in a hospital form the core of the medical staff. But they couldn’t provide effective medical care to their patients without the help of numerous other medical employees. From the viewpoint of the patients, the nursing staff is particularly important. Nurses are usually in close contact with patients as long as they are in the hospital.

A nurse does not study for as many years as a doctor. However, each must be equally dedicated. Caring tot sick persons requires a great deal of patience and concern. Most nurses work long days, and they often must work at odd hours or during the night.

Under the supervision of the head nurse, the nursing staff must provide nursing services on 24-hour basis and attend to patients’ needs. This responsibility continues around the clock, and so nurses must work in shifts. A shift is a period of duty, usually eight in length. The nurses on the ward rotate their shifts. All of them work out of a central area on the ward called the nurses’ station.

A nurse must always be alert. She can never afford to be careless. This is true in all nursing situation, but it is especially true in the intensive care unit. Patients under intensive care duty have one of the most demanding jobs in the hospital.

Serving as a nurse can be a very. rewarding job. But it is not an easy one. Not every person is suited to become a nurse. Only very dedicated people have chosen nursing as a profession.

Why must nurses work in shifts（）

A．They are careless.

B．Nursing services must be provided continuously.

C．They work at night from time to time.

D．A shift is usually eight hours long.

函数f（x）=2^x+log₂x（x∈[1，2]）的值域为______．

若有以下程序 #include ＜iostream＞ using namespace std; class A { public:A(int i,int j){ a=i; b=j;}void move(int x, int y){ a+=x; b+=y;}void show(){ cout ＜ ＜a ＜ ＜" , " ＜＜b＜＜ end1;} private:int a,b; }; class B : private A { public:B(int i,int j) :A(i,j) {}void fun ( ){ move (3, 5);}void f1 ( ){ A::show();} }; int main ( ) {B d(3,4);d. fun ( );d.f1();return 0; } 程序执行后的输出结果是 ( )。

A．3,4

B．6,8

C．6,9

D．4,3

2008年被称为互联网引导舆论元年。从奥运火炬传递时MSN“红心照耀中国”，到汶川地震时的“网络爱心集结”，互联网以其便利性和互动性，正日益成为被广泛接受的民意通道。引导互联网舆论建设有助于[ ]

①人民直接管理国家和社会事务      

②拓宽民主监督的渠道 

③人民行使当家作主的权利          

④了解民情，听取民意

A．①②③        

B．②③④　       

C．①③④         　

D．①②③④

下列不属于调度通信系统设备的外观强度标准的（）

A.设备安装牢固、位置适当，使用维修方便。

B.系统可用率=（每半年系统无障碍总时长/半年总时长）X100%。（≥99%为合格）

C.各零部件坚固、完整无缺，机内外金属器件无严重锈蚀，油饰良好。

D.按键、扳键、话机叉簧接点、数调操作台键盘操作良好，动作正确灵活，自复及可锁性能良好。