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问题 选择题

下列有关俄国的历史事件，按发生的时间先后顺序排列，正确的是

①二月革命爆发  ②《四月提纲》发表  ③彼得格勒武装起义  ④新经济政策实施

A．①②⑧④

B．②①⑧④

C．①②④③

D．②①④③

答案

答案：A

问答题 简答题

试论述企业清洁生产的实施要点。
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单项选择题

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (6) of the technical requirements for the software product.
During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each (7) that it must meet. The starting point is usually a set of high-level requirements from the (8) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and then defines (9) showing how the system will be operated, publishes the system and operations concept document, and conducts a system concept review (SCR).
Following the SCR, the team derives (10) requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis the team specifies the software functions and algorithms needed to, satisfy each detailed requirement.

A．rules

B．principles

C．scenarios

D．scenes
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