请补充括号中的信息，要求是查询年龄大于等于21岁的学生的姓名和年龄： select sname,sage from student ( ) A: where sage>=21 B: where sage>21 C: where sage<=21 D: where sage<21

‎从Student表检索年龄小于21岁的男学生信息，最规范的SQL语句是( )。‍ A: Select * From Student Where Ssex='男' Or Sage<'21' B: Select * From Student Where Ssex='男' Or Sage<21 C: Select * From Student Where Ssex=男 And Sage<'21' D: Select * From Student Where Ssex='男' And Sage<21

BookStore数据库中有出版社表Publisher(PublisherCode, Publisher, Telephone) 在某SQL语句中，WHERE PublisherCode IN ('21', '31')子句等价于________。

用be动词填空 Where _ the phone? Where _ Casey? Where _ Stacey? Where _ Jason and Brad? Where _ Fred?

Theschool_____Ivisitedlastyearwasnottheone_____Ionceworked. A: which;where B: which;which C: where;which D: where;where

____ you have hidden my umbrella ? A: It is where that B: Where it is C: Is it where that D: Where is it that

【多选题】21题 A. 21题A B. 21题B C. 21题C D. 21题D

40枚种蛋的孵化天数如下，问这个孵化天数与21d有和差异？（计算t值） 20 19 21 22 21 20 18 20 21 19 23 18 22 20 21 19 20 21 21 20 19 24 20 19 21 21 20 19 21 23 20 20 18 21 20 21 19 23 20 21

弹奏这种伴奏音型的指法一般是() A: 4/21/5/21 B: 3/21/5/21 C: 5/21/5/21 D: 4/31/5/31

Questions 19 to 21 are based on the passage you have just heard. A: The training methods and the quality of the training staff . B: The performance of the trainees in the programme . C: The places where the training programmes take place . D: The way to evaluate the training programme .