题目:About life-cycle models, Which three statements are true
A. the 'code-and-fix' software life-cycle model is fine for short programs that will not need maintenance
B. the spiral software life-cycle model can be used for large-scale, in-house products
C. the rapid prototyping software life-cycle model ensures that the deliveredproduct meets the client'sneeds
D. the waterfall software life-cycle can be used only for large-scale, in-house products
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