People often watch their favourite sports on ______ TV or listen to them on ______ radio. [ ]

A. the, the

B. the, ×

C. ×, the

D. ×, ×

不属于招标投标管理基本原则的是（）。

A．公正原则

B．公平原则

C．公开原则

D．国产化原则