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"
A: Birthday>="1990-01-01"
B: Birthday>=1990
C: Birthday="90后"
D: Birthday>="90后"
举一反三
- 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"
- 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________
- 【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