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[音频]

A Having a happy family.
B Planning a reunion party.
C Looking for exciting jobs.
D Meeting former classmates.

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A He totally understands the woman'ssituation.
B He fels very sorry for the woman'sroommate.
C Thewoman shouldn't keep pets in herdormitory.
D The woman shouldn't quarrel with herroommate.

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[音频]

A Having a happy family. B Planning a reunion party. C Looking for exciting jobs. D Meeting former classmates.

[音频]

维护阶段是软件生存周期中时间最长的阶段,也是花费精力和费用____的阶段。

软件维护的工作流程是?

成本_效益分析可用哪些指标进行度量?写出计算现有价值的公式。

A Having a happy family.
B Planning a reunion party.
C Looking for exciting jobs.
D Meeting former classmates.