对气相色谱柱分离度影响最大的是（）。

A.载气的种类；

B.载气的流速；

C.柱子的长度；

D.填料粒度的大小；

E.色谱柱柱温。

It is not enough to ensure that the suppliers provide value for money; the governmental buyer must enter into a dialogue with the suppliers to ensure as far as possible that the form of the procurement is persisted to the enhancement of the supply industry’s global competitiveness.

A．cooperative with

B．consistent with

C．cooperative in

D．consistent in