铅化合物的毒性大小主要取决于：（）
A.溶解度
B.化学结构
C.分散度
D.分散度及在人体组织内的溶解度
E.比重
参考答案：D
肝素及其盐
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
