有如下定义：struct date{int y ;int m ;int d ;};struct person{ char name[20]; char sex; struct date birthday;}a;对结构体变量a的出生年份进行赋值时，下面正确的赋值语句是（ ）。 A: y =1958 B: birthday.y=1958 C: a.birthday.y =1958 D: a.y =1958

【单选题】def happy(): print("Happy birthday to you!") def happy_birthday(name): happy() print("Happy birthday, dear {}!".format(name)) happy() happy_birthday("teacher") A. Happy birthday to you! Happy birthday to you! Happy birthday, dear teacher! Happy birthday to you! B. Happy birthday to you! Happy birthday, dear teacher! Happy birthday to you! Happy birthday to you! C. Happy birthday to you! Happy birthday, dear teacher! Happy birthday, dear teacher! Happy birthday to you! D. Happy birthday to you! Happy birthday, dear teacher! Happy birthday to you!

有如下代码： StringBuffer buffer = new StringBuffer("Happy Birthday");buffer.insert(2, '5');System.out.println(buffer);则最后输出的结果是（ ） A: Hap5py Birthday B: H5appy Birthday C: Ha5py Birthday D: Ha5ppy Birthday

She is such a difficult girl to please ________. A: when birthday gifts are concerned B: when concerning birthday gifts C: when birthday gifts concerned D: when birthday gifts concerning

--Happy birthday!--______. A: Happy B: Happy birthday C: Thank you

​如果要约束学生表的人员必须是“90后“，那么Birthday字段（日期型）应该添加的检查约束时________。‍ A: Birthday>="1990-01-01" B: Birthday>=1990 C: Birthday="90后" D: Birthday>="90后"

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'])

---Happy birthday!--______

Oh , I forgot _________(send) my sister a birthday card and it’s her birthday tomorrow.

当你想知道奶奶什么时候时候过生日时，你可以问：___________ A: When is his birthday? B: When is Grandma's birthday? C: Grandma's birthday is in June 23rd.