在生产过程中，需按污水中BOD5的大小在哪里投加尿素及磷酸氢二钾？
参考答案：在提升泵房入水水渠中投加
When I met him the other day, it was the first time we ____ each other since we were at school. [ ]
A. saw
B. had seen
C. were seeing
D. have seen
下列一般以药用部位或来源进行炮制分类的是（）
A.教材
B.《中华人民共和国药典》
C.《炮制规范》
D.《炮炙大法》
E.《雷公炮炙论》
