题目内容

A _________ conversion involves shutting the old system off and turning the new system on at a certain point in time.

A. direct
B. parallel
C. phased
D. pilot

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_________ conversion is the most risky.

A. Direct
B. Parallel
C. Phased
D. Pilot

A _________ conversion introduces the new system in one part of the organization.

A. direct
B. parallel
C. phased
D. pilot

A _________ conversion introduces components of the new system in stages.

A. direct
B. parallel
C. phased
D. pilot

A _________ conversion involves running the old and new systems at the same time.

A. direct
B. parallel
C. phased
D. pilot

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