题目

为了使K2CO3溶液中c(K+):c(CO32-)接近2:1，应加入（ ）           A．NaOH      B．K2CO3        C．KOH       D．H2O 答案：ABoris has brains.In fact, I doubt whether anyone in the class has _______ IQ.A．a high B．a higherC．the higherD．the highest