题目内容
（请给出正确答案）
[主观题]
All of the following are advantages of expert programs EXCEPT that[A] they have an indefin
All of the following are advantages of expert programs EXCEPT that
[A] they have an indefinite life span.
[B] they cost little to reproduce.
[C] many copies can be made available.
[D] they are self-analytical.
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