When did Connie and I find out that we were not related().

A.After we corresponded several times.

B.When we met.

C.After we were married.

D.After we corresponded for six months.

南岳单体泵系统使用的诊断仪属于以下哪种类型（）

A.USBCAN

B.K-Line

C.RS232

D.TTL-232C