If you want to start your own photographing company, you’d employ someone who knows _____, which can contribute to the success of your business. [ ]
A.
the tricks of the trade
B.
the trades of the trick
C.
the tricks of trade
D.
tricks of the trade
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【简答题】创建一个名为view_stu的视图,将student数据表中的sno,sname,sbirthday三列导入到该视图中,并分别命名为“学号”,“姓名”,“出生日期”。 create view as select sno,sname,sbirthday from student;A. view_stu(学号,姓名,出生日期)
【单选题】All the students at school are required to ____ lectures by the experts on howto save themselves when accidents occur, such as fires, a gas leak and so on.