用氢-钠离子交换法处理后，应使水中保留一定的（）。A、硬度 B、碱度 C、酸度 D、

Janet as well as the other young people who          sent abroad by the government        brought up in a small town.

A．was, was

B．was, were

C．were, were

D．were, was

I like the pair of glasses a lot. Can I _____?[ ]

A. try it on  

B. try on it  

C. try them on  

D. try on them

在外界负荷不变的情况下，（）的稳定主要取决于锅炉的储热能力。

复种指数

杭州菜具有清鲜、细嫩、制作精细的特点。