“制造或购买”的决策分析的核心问题是能力问题。
参考答案：错
--- You have not lost your heart, then?
--- ________. I will try again.
A．It depends
B．By no means
C．Don’t mention it
D．Maybe
吊扇扇叶距地高度不小于（）m。
A、2.5
B、2.8
C、3
