下面几种故障中，会破坏正在运行的数据库的是______。

A．中央处理器故障

B．操作系统故障

C．突然停电

D．瞬时的强磁场干扰

句型转换。

1.He goes to see his grandparents four times a month.(就划线部分提问)

 ___________   ___________  does he go to see his grandparents?

2.They can play basketball three times a week.( 就划线部分提问)

________  ________  ________ can they play basketball a week?

3.You can keep this book for two weeks.( 就划线部分提问)

________ __________ can you keep this book?

4.My father is going to Beijing in a week.( 就划线部分提问)

_______ _______ is your father going to Beijing?

5.My mother goes to work by car.( 就划线部分提问)

______ ______ your mother _____ to work?

6.I often play Counter Strike and Final Fantasy.( 就划线部分提问)

______ ________ do you often play?