单项选择题

 Errors caused by inconsistencies between the discoloration point of an indicator and the stoichiometric point are called (   )

A.random error
B.method error
C.terminal error
D.reagent error
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单项选择题

Val("23.4a1")的值为(  )。

A."23.4"
B.0
C.23.41
D.23.4