单项选择题

The following short passage is mainly about

A．knowledge acquisition research.
B．knowledge-based system development.
C．the conceptual computational structures.
D．the cognitive processes.

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单项选择题

The cooperation of the students and employers has offered information that led raids on

A．the Massachusetts Institute of Technology.
B．the University of California at Los Angeles.
C．the Rochester Institute of Technology.
D．the Duke University.

单项选择题

Operation Buccaneer is

A．directed by the officials of the Customers Service.
B．conducted by the Federal Bureau of Investigation.
C．carried out under the cooperation with many people.
D．supported by the Central Intelligence of Americ

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