企业为增加产品销售量而发生的业务招待费应当计入（）。
参考答案：管理费用
Maria has written two novels, both of _____ have been made into television series.
A．them
B．that
C．which
D．what
富燃料燃烧火灾为什么常常出现“风压脉动”现象？
