【简答题】Please give at least four different means of illustration to make your points effectively in presentation.
【单选题】在工作表B列保存了11位手机号码信息,为了保护隐私,需将手机号码后4位用“*”表示,以对B2单元格操作为例,最优的操作方法是在其他单元格输入( )。
A.
=REPLACE(B2, 7, 4, "****")
B.
=REPLACE(B2, 8, 4, "****")
C.
=MID(B2, 7, 4, "****")
D.
=MID(B2, 8, 4, "****")
【单选题】在工作表B列保存了11位手机号码信息,为了保护隐私,需要将手机号码的后四位用“*”表示,用函数实现是在其他单元格输入( )。
A.
REPLACE(B2,7,4,"****")
C.
REPLACE(B2,8,4,"****")
【单选题】已知employee表中具有默认约束df_email,删除该约束的语句为()。
A.
alter table employee drop constraint df_email
B.
alter table employee remove constraint df_email
C.
alter table employee delete constraint df_email
D.
remove constraint df_email from table employee
【单选题】红茶、绿茶、乌龙茶的香气主要特点是红茶甜香、绿茶板栗香、乌龙茶( )
【单选题】在Excel工作表中保存了11位手机号码信息,数据放在 B列 为了保护个人信息,需将手机号码的后4位用“*”表示,以B12单元格为例,最好的操作方法是:
A.
=REPLACE(B12,7,4,"****")
B.
=REPLACE(B12,8,4,"****")
【简答题】What information does a reservationist need to make a reservation? Please list at least 4 items.
【单选题】已知employee表中具有默认约束df_email,删除该约束的语句为:
A.
alter table employee delete constraint df_email
B.
alter table employee remove constraint df_email
C.
alter table employee drop constraint df_email
D.
remove constraint df_email from table employee