开班登录时，选择登录的收银员姓名（）是本班次的真实收银员姓名。
A、必须
B、可以
C、无需
D、以上都不对
参考答案：A
— Hey! Here is a message on my cell phone, telling me to send money to...
— Delete it! It's a trick. Many a person _____ by such tricks. [ ]
A. has been cheated
B. have been cheated
C. were cheated
D. was cheated
SQL语言又称为
A．结构化定义语言
B．结构化控制语言
C．结构化查询语言
D．结构化操纵语言
