依据现行《建筑设计防火规范》的规定，消防应急照明灯具和灯光疏散指示标志的备用电源的连续供电时间最少为（）。

A.20min

B.30min

C.45min

D.60min

— Would you like to see the menu? —（）

A.No, thanks. I already know what to order

B.Your menu is very clear

C.I hear the food here is tasty

D.The setting is very comfortable