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单项选择题
In acidic solution, using potassium permanganate to titrate oxalic acid, the reaction rate is slow at room temperature and not conducive to titration, which of the following can be used to improve the reaction rate ( )
A．Raise the temperature
B．Reduce the temperature
C．Reduce the concentration of reactants
D．Add indicator
B．Reduce the temperature
C．Reduce the concentration of reactants
D．Add indicator
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