单选题If the radius of a circle is increased by 40%, how much will the area increase?A 16%B 20%C 40%D 80%E 96%

A50%，50%

B40%，60%

C80%，20%

D20%，80%

（ 13 ）补充完整下面的类定义：

const double PI=3 .14;

class Circle{ // 圆形物体的抽象基类

protected:

double r; // 半径

public:

Circle （ double radius=0 ） ： r （ radius ） {}

【 13 】 ； // 计算圆形物体表面积的纯虚函数声明

};

class Cylinder:public Circle { // 圆柱体类

double h; // 高度

public:

Cylindr （ double radius=0, doubli height=0 ） ：

Circle （ radius ） ， h （ height ） {}

Virtual double Area （） { // 计算圆柱体的表面积

return 2*PI*r* （ r+h ） ；

}

};

How much time does the typical project manager spend communicating (formal and informal)?

A 40% - 60%

B 30% - 70%

C 60% - 80%

D 75% - 90%

E 25% - 55 %

下列程序中，先声明一个圆类circle和一个桌子类table，另外声明一个圆桌类roundtable，它是由 circle和table两个类派生的，要求声明一个圆桌类对象，并输出圆桌的高度，面积和颜色。请填空完成程序

include＜iostream.h＞

include＜string.h＞

class circle{

double radius；

public：

circle(double r){radius=r；}

double get_area(){return 3.416*radius*radius；}

}；

class table{

double height；

public：

table(double h)＜height=h；}

double get_height(){return height；}

}；

class roundtable：public table，public circle{

char *color;

public：

roundtable(double h，double r，char c[])： 【 】 {

color=new char[strlen(c) +1]；

【 】；

}；

char*get_color(){return color；}

}：

void main(){

roundtable rt(0.8，1.0，“白色”);

cout＜＜"圆桌的高:"＜＜rt. get_height()＜＜end1;

cout＜＜"圆桌面积:"＜＜rt.get_area()＜＜end1;

cout＜＜"圆桌颜色:"＜＜n.get color()＜＜end1;

}

What are you recommended to answer the question tell me about yourself, if you are seeking for your first job?

A.Speak much about how that job appeals to you and caused you to apply for it.

B.Speak much about how your enthusiasm about an area has driven you to want that job.

C.Speak much about how a book you’ve read or a person you’ve known motivated you to get that job.

D.Speak much about how your past experiences made you decide to compete for that job.

A The product should finance itself ;

B Well, it seems that we underestimated the costs ;

C You only need a budget increase for the first order

107 How much time does the typical project manager spend communicating (formal and informal)? A. 40% - 60%

B. 30% - 70%

C. 60% - 80%

D. 75% - 90%

E. 25% - 55 %

根据程序中的注释将下列缺失部分补充完整。

class Point{

int x，y； ／／点的x和y坐标

public：

Point(int xx=0，int yy=0)：x(xx)，y(yy){}

}；

class Circle{

Point center；／／圆心位置

int radius； ／／半径

public： ／／利用cx和cY分别初始化圆心的x和y坐标

circle(int cx，int cy，int r)： 【 】 ，radius(r){}

void area()(cout<<3．14159*radius*radius<<end1；)

};