【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
【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 ______.