找考题网-背景图
单项选择题

测定钾、钠、铁时,光谱通带应选:()

A.钾、钠选0.4nm,铁选0.1nm
B.钾、钠选0.1nm,铁选0.4nm
C.钾、钠、铁均选0.1nm
D.钾、钠、铁均选1.0nm