Try to guess its meaning when you meet a new word. Don't ______ your dictionary all the time. [ ]

A. work on

B. try on

C. keep on

D. depend on

招标采购工作先后关系的确定是依据( )。

A．费用大小

B．逻辑关系

C．组织关系

D．质量关系

E．功能关系