天癸的产生主要取决于（）
A.肾中精气的充盈
B.脾气的健运
C.肾阳的蒸化
D.肝血的充足
E.肾阴的滋养
参考答案：A
It rained a lot during their journey, so they have had a good time. [ ]
A. can't
B. must
C. shouldn't
D. might
天然水水样中既有暂时硬度，又有永久硬度，而无钠盐碱度，则水样中碱度和硬度的关系是（）。
A.碱度＜硬度
B.碱度＝硬度
C.碱度＞硬度
D.无法判断
