妙香散治疗遗精的哪一型（）
A.君相火旺证
B.湿热下注证
C.劳伤心脾证
D.肾气不固证
E.脾肾两虚证
参考答案：C
— I heard they went skiing in the mountains last winter.
— It _____ true because there was little snow there. [ ]
A. may not be
B. won't be
C. couldn't be
D. mustn't be
在结晶操作中，若溶液过饱和度大，冷却速度快，强烈的搅拌，得到的晶体颗粒（）
A、大
B、小
C、适中
D、参差不齐
