A．How to interact with colleagues and clients face to face.

B．How to make effective telephone conversations.

C．What skills are needed to get and hold down a job.

D．What makes for an excellent ability to express yourself.

运输包装的主要作用在于（）

A.保护商品

B.便于运输与储存

C.促销

D.美化商品

E.防止在装卸过程中发生货损货差