我们所指的朗伯-比尔定律是说明光的吸收与（）和（）成正比，它是比色分析的理论基础.
参考答案：吸收层厚度；溶液浓度
—What do you think of the talk shows hosted by Zhou Libo?
—________. I watch them every week. [ ]
A. I love them
B. I can't stand them
C. I don' t like them
妊娠期间容易出现宫颈糜烂。
