炙甘草在炙甘草汤中的作用是（）A.缓急止痛 B.补益心气 C.滋养心阴 D.调

In my senior high school, I will  ______ than I did in my junior high school.

A．study more harder

B．be hardworking

C．work harder

D．study hard

我国传统节日中，最希冀家人团圆的两个节日是

In Which phase of the software engineering process iS the Software Requirements Specification developed

A．definition phase

B．engineering phase

C．maintenance phase

D．development phase

简述干燥酸浓度偏低，提不起来时什么原因及处理办法？

通常只要投入凝汽器换热管总数（）左右的胶球即可满足运行中。

A.1%

B.10%

C.50%

D.80%