设A、B两点关于直线MN轴对称，则直线MN与线段AB的关系是（    ）。

The approach we propose is a system-oriented methodology for knowledge acquisition, this orientation emphasizes ongoing documentation throughout each cycle and technique applied. Program-wide documentation is suggested, both for the purpose of internal (91) and for later verification and (92) efforts. The documentation system we propose includes a central "knowledge acquisition (93) " which is (94) to reflect knowledge acquisition plans, session nodes, and domain expert participation. Specifically, (95) within the database system include knowledge acquisition forms, which document plans for, and notes from, knowledge acquisition session, domain expert file, and rule content forms.

（94）是（）

A.edited

B.updated

C.exchanged

D.revised