原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长分别是

A.283.3nm357.9nm228.8nm253.7nm

B.357.9nm253.7nm228.8nm283.3nm

C.253.7nm357.9nm228.8nm283.3nm

D.283.3nm253.7nm228.8nm357.9nm

E.228.8nm283.3nm253.7nm357.9nm