应急包内的主要应急物品应该包括（）。
A、食品
B、饮料
C、多功能电筒
D、口罩
参考答案：A, B, C, D
--- ___________________
--- I’m being served. Thank you anyway.
A．May I have the bill?
B．Can I take your order?
C．How would you like your coffee?
D．What about eating out?
电空接触器作用慢是由哪些原因造成的？
