水库正常运行的最低水位以上到正常高水位间的库容称()
A、有效库容
B、防洪库容
C、总库容
参考答案:A
---Where did you ______ our chemistry teacher?
---It was in the supermarket ______ I purchased moon cakes.
A.come to, where
B.come across, that
C.come across, where
D.come to, that
研究性学习课程就是科技类活动课程。