The president made a decision to take immediate action _______ the improvement of the poor’s living conditions.

A．contributed to

B．contributing to

C．consisted of

D．consisting of

关于甲胎蛋白正确的是（）。

A.正常人AFP在出生后1～2周消失

B.常见检测有定性和定量两种

C.定量法正确值<2000μg/L

D.AFP可作为肝癌病情、疗效、预后的估计

E.AFP特异性强，不会出现假阳性或假阴性