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 (71) and for later verification and (72) efforts: The documentation system we propose includes a central "knowledge acquisition (73) "which is (74) to reflect knowledge acquisition plans, session nodes, and domain expert participation. Specifically, (75) 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.

（71）处填（）。

A．interchange

B．interface

C．communication

D．message

中国古代四大发明中的（）标志着信息技术发展的重要历程。

A、印刷术和造纸术

B、文字的发明和使用

C、语言的前生和使用

D、指南针的发明和使用