.

The last time we had great fun together was _________we were flying kites in Xinghai Square, which will be remembered forever.

A．when

B．in which

C．what

D．which

把SQL语言嵌入主语言使用时必须解决的问题有( )。 ①区分SQL语句与主语言语句 ②数据库工作单元和程序工作单元之间的通信 ③协调SQL语句与主语言语句处理记录的不同方式

A．①和②

B．①和③

C．②和③

D．①、②和③