题目内容
A rapid prototype is hastily built software that exhibits the key functionality of the target product.
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Close-ended questions are asked to encourage the person being interviewed to speak out.
Encouraging users to experiment with the human–computer interface (HCI) greatly reduces the risk that the finished product will have to be altered.
A functional requirement specifies an action that the target product must be able to perform.
（）用来指示电源系统的工作情况。
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