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下图为“我国黄土高原某省会的城市功能分区示意图”。读图回答下列小题。

图中甲、乙、丙、丁分别表示（）

A.住宅区、行政区、工业区、文教区

B.商业区、住宅区、行政区、工业区

C.文教区、商业区、绿地、住宅区

D.工业区、商业区、住宅区、绿地

答案

参考答案：D

单项选择题

Object-oriented analysis(OOA)is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) and associated scenarios. The second is (73) ，which determines the classes and their attributes. Then determine the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

73（）

A．use-case modeling

B．class modeling

C．dynamic modeling

D．behavioral modeling
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填空题

每个SSS序列由频域上2个长度为（）的BPSK调制辅助同步码交错构成
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