与客人确认挂帐金额时，前台服务员的标准用语是（）。
参考答案：x先生/小姐，您是xxx房间，您的挂账金额是xxx元，请签名
— Can you tell me something about the rules to play this game?
— Sure. If one question ______ correctly, another question ______ to you. [ ]
A. is answered; is answered
B. will be answered; is answered
C. is answered; will be answered
D. answers; will be answered
室内覆盖系统采用直放站做信号源，设计时应使直放站的（）平衡。
A.上行链路
B.上下行链路
C.下行链路
D.上行底噪
