更换的车身新板件在焊接之前要做（）。
A.清洁所有的油漆或底漆
B.涂刷防锈底漆
C.进行必要的切割
D.如果用塞焊要先钻孔
参考答案：A, B, C, D
票据贴现属于( )。
A．票据发行业务B．票据一级市场业务C．票据二级市场业务D．票据延伸业务
Wouldn't you feel rather________if you rushed to the airport to meet your friends only to find that
they had already been picked up by other people? [ ]
A. satisfied
B. happy
C. annoyed
D. bored
