问题
单项选择题
Theuniversalcolourreagentofthethin-layerchromatographyincludes
A．Thesolutionofconcentratedsulphuricacid
B．Molishreagents
C．Potassiumiodide
D．Sodiumnitrite
E．Sodiumchloride
答案
参考答案：A
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