【单选题】Choose the best answer to approach the guest in the following situation. The guest is waiting to be served. You say:
B.
(Smile and say) I'll be with you in a moment, sir.
C.
__________ (you keep quiet)
【判断题】You can't take away the guest's laundry if the guest is not in the room.
【单选题】图 2-67 所示电路中,一有源两端网络如图 (a) 所示,图 ( b ) 所示为其戴维南等效电路,则 U 0 、 R 0 分别为
【判断题】筛板塔的负荷性能图由液量下限线、液量上限线、气量下限线、气量上限线和漏液线组成
【判断题】When making up the room a room attendant must introduce the room facilities if the guest is in.
【单选题】According to the passage, when the pod is in orbit 460 kms above the earth, the guest is going to travel around the earth ______.