非碱性水的特征是硬度()碱度,即〔Ca2+〕+〔Mg2+〕(>)〔HCO3-〕。此时,水中有()盐硬度存在。
参考答案:大于;非碳酸
—Drugs(毒品) have done great harm to some people and their families.
—I quite agree with you. So we should _____ them. [ ]
A. stay away from
B. shut down
C. get on with
D. put off
宫颈浸润癌的手术治疗适用于
A.Ia之前
B.Ib之前
C.Ib~Ⅱa期
D.Ⅱa期后
E.Ib~Ⅱb期