火灾盘内的逻辑控制器I/O板被检测到有故障()
A、修理已坏的板
B、拆除额外的板,或对附加板进行组态
C、更换被忽略的电路板
D、重新对探头进行组态
参考答案:A
Peter is so careless that he _____ the books on the shelf. [ ]
A. knocked over
B. knocked into
C. turned over
D. looked through
离心泵跳车可能因为电机电源接反,造成泵反转。