System analysis is traditionally done top-down using structured analysis based on (1) ．Object-oriented analysis focuses on creation of models．The three types of the analysis model are (2) ．There are two substages of object-oriented analysis． (3) focuses on real-world things whose semantics the application captures．The object constructed in the requirement analysis shows the (4) of the real-world system and organizes it into workable pieces． (5) addresses the computer aspects ofthe application that are visible to users．The objects are those which can be expected to vary from time to time quite rapidly．

5（）

A．Program analysis

B．Function requirement

C．Application analysis

D．Physical model

近年来，美国一再发生校园枪杀事件。尽管许多城市的民众不断举行大规模的游行示威，呼吁美国国会尽快通过更加严格的控制枪支法案，但他们始终敌不过“全国步枪协会”及其在政府和国会的“盟军”。这表明（）

A.美国的国家决策是由多数利益集团决定的

B.美国的利益集团机制实质上是资产阶级在“民意”幌子下控制权力

C.美国资产阶级各派及其代理人通过利益集团竞争，相互制衡，推卸责任

D.美国国会议员、政府官员与利益集团之间形成了一种密切的共生关系