— Why did you give up the job in America?

— Because I don’t want to stay far away from my girlfriend. You know, she means ______ to me.

A．everything

B．nothing

C．anything

D．something

物流系统的效益背反包括（）

A.物流成本与服务水平的效益背反

B.构成物流成本的各个环节费用的效益背反

C.物流功能之间的效益背反

D.各子系统的功能和所耗费用的效益背反

E.物流系统投入与产出的效益背反