从datetime类型的数据列 birthday 中获取年份,正确 的方法是: A: frame['birthday'].dt.year B: frame['birthday'].year C: datetime.now().year D: pd.to_datetime(frame['birthday'])
从datetime类型的数据列 birthday 中获取年份,正确 的方法是: A: frame['birthday'].dt.year B: frame['birthday'].year C: datetime.now().year D: pd.to_datetime(frame['birthday'])
程序:class Birthday{int year;int month;int day;public Birthday(int year,int month,int day){year = year; month = month; day = day;}public static void main(String[] args){Birthday birth = new Birthday(1980,10,22); System.out.println(year);}}程序运行后的输出是哪项? A: 1980 B: 10 C: 22 D: 0 E: 编译出错
程序:class Birthday{int year;int month;int day;public Birthday(int year,int month,int day){year = year; month = month; day = day;}public static void main(String[] args){Birthday birth = new Birthday(1980,10,22); System.out.println(year);}}程序运行后的输出是哪项? A: 1980 B: 10 C: 22 D: 0 E: 编译出错
设有一结构体类型变量定义如下,若对结构体变量w1的出生年份year进行赋值,下面正确的赋值语句是( )。struct date{ int year; int month; int day;};struct worker{ char name[20]; char sex; struct date birthday;}w1; A: year=1976 B: birthday.year=1976 C: w1.birthday.year=1976 D: w1.year=1976
设有一结构体类型变量定义如下,若对结构体变量w1的出生年份year进行赋值,下面正确的赋值语句是( )。struct date{ int year; int month; int day;};struct worker{ char name[20]; char sex; struct date birthday;}w1; A: year=1976 B: birthday.year=1976 C: w1.birthday.year=1976 D: w1.year=1976
在SELECT语句中,与排序有关的关键字是______。 A: ORDER BY B: LIMIT C: DESC D: ASC E: : ACD F: 、查询1997,1999年出生的同学信息,正确的SELECT语句是______。 G: SELECT * FROM student WHERE YEAR(birthday) NOT IN(1997,1999); H: SELECT * FROM student WHERE YEAR(birthday)=1997 OR YEAR(birthday)=1999; I: SELECT * FROM student WHERE YEAR(birthday) IN(1997,1999); J: SELECT * FROM student WHERE YEAR(birthday) EXISTS(1997,1999);
在SELECT语句中,与排序有关的关键字是______。 A: ORDER BY B: LIMIT C: DESC D: ASC E: : ACD F: 、查询1997,1999年出生的同学信息,正确的SELECT语句是______。 G: SELECT * FROM student WHERE YEAR(birthday) NOT IN(1997,1999); H: SELECT * FROM student WHERE YEAR(birthday)=1997 OR YEAR(birthday)=1999; I: SELECT * FROM student WHERE YEAR(birthday) IN(1997,1999); J: SELECT * FROM student WHERE YEAR(birthday) EXISTS(1997,1999);
Happy birthday! By this time of next year, you _________ (turn) 18.
Happy birthday! By this time of next year, you _________ (turn) 18.
定义如下结构体来描述一个人的基本情况: struct date {int year; int month; int day; }; struct person {char name[20]; char sex; struct date birthday; }man;如果某人的生日是1988年10月9日,下列对生日的正确赋值是 。 A: man·birthday·year=1988 man·birthday·.month=10 man·birthday·day=9 B: birthday·year=1988birthday·month=10birthday·day=9 C: man·year=1988man·month=10man·day=9 D: year=1988 month=10 day=9
定义如下结构体来描述一个人的基本情况: struct date {int year; int month; int day; }; struct person {char name[20]; char sex; struct date birthday; }man;如果某人的生日是1988年10月9日,下列对生日的正确赋值是 。 A: man·birthday·year=1988 man·birthday·.month=10 man·birthday·day=9 B: birthday·year=1988birthday·month=10birthday·day=9 C: man·year=1988man·month=10man·day=9 D: year=1988 month=10 day=9
设有一结构体类型变量定义如下,若对结构体变量w1的出生年份进行赋值,下面正确的赋值语句是( )struct date{int year;int month;int day; };struct worker{char name[20];char sex;struct date birthday;}w1; A: year=2000 B: birthday.year=2000 C: w1.year=2000 D: w1.birthday.year=2000
设有一结构体类型变量定义如下,若对结构体变量w1的出生年份进行赋值,下面正确的赋值语句是( )struct date{int year;int month;int day; };struct worker{char name[20];char sex;struct date birthday;}w1; A: year=2000 B: birthday.year=2000 C: w1.year=2000 D: w1.birthday.year=2000
设有一结构体类型变量定义如下,若对结构体变量w1的出生年份进行赋值,下面正确的赋值语句是( )struct date{int year;int month;int day;};struct worker{char name[20];char sex;struct date birthday;}w1; A: year=1999 B: Birthday.year=1999 C: w1.year=1999 D: w1.birthday.year=1999
设有一结构体类型变量定义如下,若对结构体变量w1的出生年份进行赋值,下面正确的赋值语句是( )struct date{int year;int month;int day;};struct worker{char name[20];char sex;struct date birthday;}w1; A: year=1999 B: Birthday.year=1999 C: w1.year=1999 D: w1.birthday.year=1999
设有一结构体类型变量定义如下: struct date { int year; int month; int day; }; struct worker { char name[20]; char sex; struct date birthday; }w1; 若对结构体变量w1的出生年份进行赋值,下面正确的赋值语句是( )。 A: year=1976 B: irthday.year=1976 C: w1.birthday.year=1976 D: w1.year=1976
设有一结构体类型变量定义如下: struct date { int year; int month; int day; }; struct worker { char name[20]; char sex; struct date birthday; }w1; 若对结构体变量w1的出生年份进行赋值,下面正确的赋值语句是( )。 A: year=1976 B: irthday.year=1976 C: w1.birthday.year=1976 D: w1.year=1976
假设有如下结构类型及结构变量: struct SDate { int year; int month; int day; } birthday; struct SDate *p = &birthday;<br/>则通过指针p给它指向的结构的year成员赋值为2025的语句是( ) A: p.year = 2025; B: p->year = 2025; C: (*p)->year = 2025; D: *(p->year) = 2025;
假设有如下结构类型及结构变量: struct SDate { int year; int month; int day; } birthday; struct SDate *p = &birthday;<br/>则通过指针p给它指向的结构的year成员赋值为2025的语句是( ) A: p.year = 2025; B: p->year = 2025; C: (*p)->year = 2025; D: *(p->year) = 2025;