题目

The story of ________ American South will be one of hope and success with some signs that ________ new, different South is coming out of its dark past.    A. the; a             B. an; a             C. 不填; a    D. an; the 答案：A给你提供40 g NaOH固体、足量的蒸馏水和足量的CO2气体,你怎样把NaOH完全转化成Na2CO3?