Are they in ( ) class A.same B.the same C.different

C# 怎么将类作为参数传递?
例如：我定义了实体类X1,X2,X3;还定义了
class A
{
public string ret { get; internal set; }
public string msg { get; internal set; }
public X1 data { get; internal set; }
}
class B
{
public string ret { get; internal set; }
public string msg { get; internal set; }
public X2 data { get; internal set; }
}
class C
{
public string ret { get; internal set; }
public string msg { get; internal set; }
public X3 data { get; internal set; }
}
能不能将A、B、C三个类合成一个实体类,而将X1、X2、X3作为参数在合并类中的构造函数传入.
如可否这样：
class D
{
System.Type X;
public D(System.Type type)
{
this.X=type;
}
public string ret { get; internal set; }
public string msg { get; internal set; }
public X.GetClass Data { get; internal set; }
}
当然啦,X.GetClass是不存在的,不知能不能类似这样的方法实现?

What ___ the number of the girls in your class A:is B:am c;are d:be 为什么?

一道英文数学难题!火速回答!
Class A and class B have the same number of students.In class A,the ratio of boys to girls is 3 to 2.In class B,the number fo boys is 200% of the number of girls.If one girl in class A and one boy in class b switch classes,the ratios of boys to girls in both classes will be the same.Find the numbers of boys and girls in the two classes.Show all you work.
希望过程可以短一点
注意是两班！
不是只要一班的！

'initializing' :cannot convert from 'class A *' to 'class B *'
int main()
{
A aa;
B *pb=&aa;
pb->g();
return 0;
}
#include
class A
{
public:
void virtual g(){cout

求英语作文翻译
Out-of-Class Activities Day
It was our Out-of-Class Activities Day last Wednesday.接下去翻译"那天是2007年12月12日.上午,我们在校园里植树、种花,为了美化校园.下午,我们在操场上比接力赛,我们因为有团队精神所以获得了第一.那天的活动丰富多彩,大家度过快乐的一天."
要用上make first prize excited teamwork这几个词.谢谢!

Don't make noise in ( )class Athe B/ 详细
Don't make noise in ( )class Athe B/ 详细说明

#include using namespace std; class A{ public:A *next; int date; A*f(A*head,int i); } ;

找与括号内意义相近项 Do you have（a lot of) friends in your class a:many b :much c :a lot d:any

Ann and Bella are good friends. They are in the same class and sit together. After school, they often go home together. However（尽管如此）, they have many different habits. On weekends, Ann likes to stay home, watch TV or sleep, but Bella often (1) ___________ (go) out to exercise. Ann eats candy every day, though she knows it’s (2) ___________ for her health. Bella likes candy, too, she only eats it (3) ___________ (one) a week, because she thinks eating less candy can help her to keep in good health. Today is Ann’s birthday. Ann thinks Bella will buy a bag of (4) ___________ for her. But (5) ___________ fact, Bella buys her a book. It’s about how to form good habits.

英语翻译
Class A- Any combination of vehicles with a GVWR of 26,001 or more pounds provided the GVWR of the vehicle(s) being towed is in excess of 10,000 pounds.(Holders of a Class A license may,with any appropriate endorsements,operate all vehicles within Classes B,C,and D).
Class B- Any single vehicle with a GVWR of 26,001 or more pounds,or any such vehicle towing a vehicle not in excess of 10,000 pounds GVWR.(Holders of a Class B license may,with any appropriate endorsements,operate all vehicles within Classes B,C,and D).
Class C- Any single vehicle,or combination of vehicles,that does not meet the definition of Class A or Class B,but is either designed to transport 16 or more passengers,including the driver,or is placarded for hazardous materials.(Holders of a Class C license may,with any appropriate endorsements,operate all vehicles within Classes C and D).
Class D- Any single passenger vehicle or combination,except a semi-trailer unit,truck-trailer combination,tractor,or truck with a gross vehicle weight rating (GVWR) over 26,000 lbs.,bus or school bus.
Class M- A motorcycle or any other motor vehicle having a seat or saddle for the rider and designed to travel with no more than three wheels in contact with the ground.

在C#中,关于is和as的用法
在C#中如下代码,下面说法正确的一项是（ ）
public class A{}
public classB:A{}
A a=new A ( );
B b=new B ( );
A.表达式 b as A 的值为 null
B.表达式 a as B 的值为 null
C.表达式 b is A 的值为 true
D.表达式 a is B 的值为 true

C++的复制构造
class A
{
public:
pritate:
int *x;
}
__________________________
class A
{
public:
pritate:
int i;
}
能写一下这两种情况下系统默认的复制构造函数吗?
如果成员变量不是指针,把一个对象赋给另一个对象后,两个对象的变量内存地址相同吗?
__________________________________________________________
#include
using namespace std;
class A
{
public:
A(int x)
{
i=new int;
*i=x;
}
A(A&a)
{
i=new int;
*i=*(a.i);
}
void get(){cout< ~A(){delete i;cout<<"析构";this->aa();}
void aa(){cout<<*i<private:
int *i;
};
void main()
{
A a(3);
A b=a;
b.get();
a.get();
}
析构函数析构后,这两个随机数为什么是一样的?

如果成员变量不是指针,把一个对象赋给另一个对象后,两个对象的变量内存地址相同吗?
这样的
A a(3);
A b=a;

java解析
假设A类有如下定义，设a是A类的一个实例，下列语句调用哪个是错误的？（ C ）
class A
{ int i;
static String s;
void method1() { }
static void method2() { }
}
A、System.out.println(a.i)；B、a.method1(); C、A.method1(); D、A.method2()
错误的原因！

英语翻译
我们一个星期有四个小时的课,基本上,每四次课就会有一次测验
we have four hours’ class a week,basically,we will have a test very four time 我是这样写的 但总觉得有点不对

请老师帮忙改改英语作文,
Dear Bob,
Last week I made a survey in my class about the universities they would like to go.I’m writing to tell you the result.
70 percent of my classmates choose universities in our province.They think there are more chance to be admitted to the universities in the province.25 percent of them choose university in other provinces.It will be more independence and there are more universities for them to choose from.5 percent of them choose foreign universities.They think it can improve their language as well.
Yours,
Li Hua