在出口中队长操作业务中,下列哪几项业务能够应用()
A.补费
B.补卡
C.车辆引出
D.降级
参考答案:A, B, D
On Halloween, Children in costumes ask for candies _____ shouting "Trick or Treat". [ ]
A. from door to door
B. from one door to door
C. from one door to one door
D. from door to another
装置进行气密检查时,除用肥皂水检查为明显鼓泡外,静置4h平均压降,不大于()。
A、0.1Mpa/h
B、0.3Mpa/h
C、0.2Mpa/h
D、0.05Mpa/h