若有以下定义，则对变量student1中“生日”的正确赋值方式是（ ）。struct student{ int num; char name[20], sex; struct { int year, month, day; } birthday;} ; struct student student1; A: student1.birthday.year = 2003;student1.birthday.month = 5;student1.birthday.day = 1; B: year = 2003;month = 5;day = 1; C: birthday.year = 2003;birthday.month = 5;birthday.day = 1; D: student1.year = 2003;student1.month = 5;student1.day = 1;

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);

已知对学生记录的描述为： struct student { int num; char name[20],sex; struct{ int year,month,day;}birthday; }; struct student stu; 设变量stu中的“生日”是“1995年11月12日”，对“birthday”正确赋值的程序是______。

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'])

若有以下定义，则对变量student1中“生日”的正确赋值方式是（ ）。 struct student { int num; char name[20], sex; struct { int year, month, day; } birthday; } ; struct student student1;

9.若有以下定义，则对变量student1中“生日”的正确赋值方式是 struct student { int num; char name[20], sex; struct { int year, month, day; } birthday; } ; struct student student1;

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

下面结构体的定义如下：struct student{ char name[32]; struct date{ int day; int month; int year; }birthday;};错误的初始化语句是： A: struct student s1={'Li',1,1,2000}; B: struct student s1={"Li",{1,1,2000}}; C: struct student s1={"Li",1,1,2000}; D: struct student s1={"Li",1,1};

‌下面结构体的定义如下：‎‌struct student{‎‌ char name[32];‎‌ struct date{‎‌ int day;‎‌ int month;‎‌ int year;‎‌ }birthday;‎‌};‎‌错误的初始化语句是：‎ A: struct student s1={'Li',1,1,2000}; B: struct student s1={"Li",{1,1,2000}}; C: struct student s1={"Li",1,1,2000}; D: struct student s1={"Li",1,1};

a student in their first year at university: ______