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问题 单项选择题

以衰减率Ψ=（）作为整定调节系统时稳定裕量指标，可使被调量动态偏差、过调量和调节过程时间等指标大致满足一般热工调节系统的要求。

A.0-1；

B.0.9；

C.0.9-0.95；

D.0.75-0.95。

答案

参考答案：D

单项选择题

System analysis is traditionally done top-down using structured analysis based on （）. Object-oriented analysis focuses on creation of models. The three types of the analysis model are （）. There are two substages of object-oriented analysis.（）focuses on real-world things whose semantics the application captures. The object constructed in the requirement analysis shows the （） of the real-world system and organizes it into workable pieces.（） addresses the computer aspects of the application that are visible to users. The objects are those which can be expected to vary from time to time quite rapidly.

The three types of the analysis model are （）.

A. function model, class model and state model

B. class model, interaction model and state model

C. class model, interaction model and sequence model

D. function model, interaction model and state model
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单项选择题

不属于保健性津贴的是（）。

A.卫生防疫津贴

B.医疗卫生津贴

C.环境污染监控津贴

D.科技保健津贴
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