影响比例系数K的主要因素有
A.浓度
B.液层厚度
C.吸光物质性质
D.入射光波长
E.检测温度
参考答案:C, D, E
---I think Miss Gao must be in the library. She said she would go there.
---No, she ___________ be there. I have just been there.
A.can’t
B.mustn’t
C.needn’t
D.wouldn’t
设备操作工艺文件中要明确写明各种设备的操作注意事项。