溶液浓度以毫渗量/升表示,其含义是什么?
参考答案:
毫渗量/升(mOsm/L)即溶液中能产生渗透效应的各种物质质点(分子和离子)的总浓度以毫摩尔/升计算。
--- Who told you my address ? --- I don’t remember clearly. It _____ Li Mei.
---It _____ Li Mei. She doesn’t know it.
A.can be; mustn’t be
B.may have been;must have been
C.may have been; can’t be
D.must have been ; can’t have been
督脉的穴位总数是()。
A.20个
B.21个
C.23个
D.24个
E.28个