问题
单项选择题
Whenaspeetrophotometerisused,weshouldpayattentiontotheinfluenceofsolventonabsorbance．Thesolventinthereferencecellshouldbe
A．providedbythesamemanufactory
B．producedinthesamecity
C．inthesamesize
D．inthesameconcentration
E．ofthesamebatch
答案
参考答案：E