以下不属于销售费用的是( )。
A.广告费
B.售楼处建设费
C.销售人员费用
D.交易手续费
参考答案:D
He left the place , _____ never ______ back again.
A.determined ; to come
B.being determined ; to come
C.determined ; coming
D.determining ; coming
单炉通气是怎么样操作的?