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【多选题】
对系统的语境建模的用例图建模技术要考虑:
A.
识别系统边界；识别参与者
B.
如果需要，将具有相同特征的参与者使用泛化关系加以组织。对某些参与者应用一个构造型以便加深理解
C.
将参与者应用到用例图中，并描述参与者与用例间的通信路径
D.
如果需要，在用例图中添加一些注解或约束来陈述系统的非功能需求
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