电位滴定法测定水样中酸度和碱度时，所用的指示电极不同。
参考答案：错
解析：都是采用玻璃电极为指示电极。
-"Why not ask your former boyfriend for help?"
-"How could I have ______to ask him again? Remember what happened last time?"
-"But _______brings success" [ ]
A. cheek; cheek
B. face; face
C. the cheek; cheek
D. the face; face
偏倚实际上就是()
A.系统误差
B.随机误差
C.偏差
D.变异
E.样本值与总体的差异
