— ____________
— Yes, I am a girl.[ ]
A. Are you a boy?
B. Are you a girl?
答案：B
碳素结构钢牌号中的特殊镇静钢代号为（）。
A.TF
B.TR
C.TG
D.TZ
（）performs 2 basic functions: marketing and logistics.
A.paper wrapping
B.Packaging
C.warehouse
D.transportation
