若将孙某装修工程款以结算造价形式列出，其房屋设备安装部分的间接费是由( )乘以间接费率确定。

A．安装工程直接费

B．安装工程机械使用费

C．安装工程人工费

D．安装工程其他直接费

This dictionary is very useful. It has ___ many problems about words and idioms for me.

A．looked up

B．kept up

C．taken up

D．cleared up