By the end of last month, three English songs() . A. have taughtB. have been taughtC. has taughtD. had been taught

By the end of last month, three English songs() .

A. have taught

B. have been taught

C. has taught

D. had been taught


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在下面程序的横线处填上______,使程序执行后的输出结果为1/2005。 include using nam 在下面程序的横线处填上______,使程序执行后的输出结果为1/2005。include<iostream.h>using namespace std;class Date{Public:Date(int m=1,int y=0): month(m),year(y){}void Print(){cout<<month<<"/"<<year<<end1;}______operator+(const Dated1,const Dated2);private:int month, year;};Date operator+(const Dated1,const Dated2){int year,month;year=d1.year+d2.year;month=d1.month+d2.month;year+=(month-1)/12;month=(month-1)%12+1;return Date(month,year);}void main(){Date d1(3,2004),d2,d3(10);d2=d3+d1;d2.Print();}

Which traversal method for a binary tree does the following Pascal code illustrate? Procedure traverse(p:pointer); Begin IfpNIL Then begin Traverse (p^.left); Process(p); Traverse(p^.right) End; End_A.pre_orderB.middle_orderC.noneD.last_order

有以下程序: class Date { public: Date(int y,int m,int D) ; { year =y; month=m; day=d; } Date(int y=2000) { year=y; month=10; day=1; } Date(Date D) { year=d.year; month=d.month; day=d.day; } void print () { cout<<year<<"."<<month<<"."<<day<<end1; } private: int year,month,day; }; Date fun(Date D) { Date temp; temp=d; return temp; } int main() { Date date1(2000,1,1),date2(0,0,0); Date date3(date1); date2=fun(date3); return 0; } 程序执行时,Date类的拷贝构造函数被调用的次数是A.2B.3C.4D.5

在下面程序的横线处填上适当的内容,使程序执行后的输出结果为1/2005。includeusing n 在下面程序的横线处填上适当的内容,使程序执行后的输出结果为1/2005。include <iostream.h>using namespace std:class Datepublic:Date (int m=1,int y=0):month(m .year(y}{}void Print() {cout<<month<<"/"<<year<<end1;}______operator+(const Date d1,const Dated2;private:int month year;};______operaror+(const Dated1,const Date d2)int year, month;year=d1.year+d2.year;month=d1.month+d2.month;year+=(month-1)/12;month=(month-1)%12+l;return Date{month, year}:}void main(){Date d1(3,2004),d2,d3(10);d2=d3+d1;d2.Print();}

在下向程序和横线处填上适当的内容,使程序执行后的输出结果为1/2005。 include using 在下向程序和横线处填上适当的内容,使程序执行后的输出结果为1/2005。include <iostream>using namespace std;class Date{public:Date(int m=1,int y=0):month(m),year(y){}void Print() {cout<<month<<"/"<<year<<end 1; }【 】 operator+(eonst Date d1, const Date d2);private:int month,year;};【 】 operator+(const Date d1, const Date d2){int year,month;year=d1.year+d2.year;month=d1. month+d2.month;year+=(month-1 )/12;month=(month-1 )% 12+1;return Date(month,year);}void main()Date d1 (3,2004),d2,d3(10);d2=d3+d1;d2,Print();}

有以下程序: class Date { public: Date(int y, int m, int d); year = y; month = m; day = d; Date(int y = 2000) year = y; month = 10; day = 1; Date(Date d) { year = d.year; month = d.month; day = a.day; } void print() cout<<year<<"."<<month<<"."<<day<<end1; } private: int year, month,day; }; Date fun(Date d) Date temp; temp = d; return temp; } int main() { Date date 1 (2000,1,1),date2(0,0,0); Date date3(date 1); date2 = fun(date3); return 0; } 程序执行时,Date 类的拷贝构造函数被调用的次数是A.2B.3C.4D.5

已知last指向单向简单链表的尾结点,将s所指结点加在表尾,不正确的操作是____。A.last->next=s,last=s,last->next=NULL;B.last->next=s,s->next=NULL,last=s;C.s->next=NULL, last->next=s, s=last;D.s->next=NULL, last->next=s,last=s;

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已知last指向单向简单链表的尾结点,将s所指结点插入在表尾,正确的操作是____。A.s->next=s,last=s,last->next=NULL;B.last->next=s,s->next=NULL,last=s;C.s->next=NULL, last->next=s, s=last;D.s->next=last, last->next=NULL,last=s;

已知last指向单向简单链表的尾结点,将s所指结点加在表尾,正确的操作是____。A.s->next=s,last=s,last->next=NULL;B.last->next=s,s->next=NULL,last=s;C.s->next=NULL, last->next=s, s=last;D.s->next=last, last->next=NULL,last=s;