低压断路器采用液压式脱扣器时,()保护可共用一个脱扣器。
A.过载和短路
B.失压和短路
C.过载和失压
参考答案:A
He ran all the way to the station only _______________ the train had already left.
A.find
B.to find
C.finding
D.to have found
主机减缸航行时应(),若减缸后增压器喘振,应()
A.降速/继续降速
B.增速/继续增速
C.降速/适当增速
D.增速/适当减速