单项选择题

在计算机联锁系统中，进路处理模块分成（）个子模块。
A、1
B、2
C、3
D、4

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单项选择题

思维导图软件不能够输出图片格式。

A．对
B．错

单项选择题

I_myself French from 7 to 9 yesterday morning. I_to work.
A、was teaching; didn't go
B、taught; didn't go
C、was teaching; went
D、taught; went