库存管理的目标就是通过综合分析，使（）最小。
参考答案：库存费用、订货费用、缺货损失之总和
除去乙烷中乙烯的办法是（ ）
A．点燃
B．通过溴的四氯化碳溶液
C．通过浓硫酸
D．通过石灰水
— When I was young, I liked playing with toy animals.
— ______.
A．So I was
B．So was I
C．So did I
D．So I did
