【单选题】When you leave, don’t forget to the light.
【单选题】-Could you please _ the light when you leave? -Sure, I will. [ ]
【单选题】许多航空公司经常200%超售繁忙航线上的机票。
A.
Many airlines irregularly overbook busy routes to as much as 200 percent.
B.
Many airline regularly overbook busy routes by asmany as 200 percent.
C.
Many airlines regularly overbook busy routes by as much as 200 percent.
D.
Many airline regularl overbook busy routes by as much as 20 percent.
【多选题】在SSMS中找到相应的数据库,展开,找到相应的表,右键,快捷菜单中选择“设计”,此时,在弹出的表设计器中用户可以做下列哪些操作:
C.
设置字段的数据类型、是否允许空值、是否是主键、CHECK约束
【单选题】Life's been a long, exciting trip, and it's taken me to a lot of places: law school at Yale with Hillary Rodham Clinton; speechwriting at the White House for Richard Nixon; preparing stock advertising...
【单选题】表设计器中的某个字段的“允许NULL值”栏如果取消了勾选,实际上就是创建该字段的( )约束。
【单选题】Please _____ the light when you leave. [ ]