单项选择题

A.锐线光源—单色器—样品池(比色皿)—光强检测器—(吸光度)记录仪
B.钨丝灯或氘灯光源—样品池(比色皿)—单色器—光强检测器—(吸光度)记录仪
C.钨丝灯或氘灯光源—单色器—样品池(比色皿)—光强检测器—(吸光度)记录仪
D.锐线光源—样品池(比色皿)—单色器—光强检测器—(吸光度)记录仪