【单选题】【消耗次数：1】
（）它又称合作图，它和时序图一样，也是用于描述对象间的交互关系，侧重说明哪些对象之间有消息传递
①
状态图
②
活动图
③
顺序图
④
协作图
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相关题目
【简答题】
[填空]，它又称合作图，它和时序图一样，也是用于描述对象间的交互关系，但侧重点不同。
【单选题】
（）反映的是多个对象之间的交互关系。它着重表现对象间消息传递的时间顺序，顺序图有两个坐标轴，纵轴表示时间，横轴表示不同的对象。
①
状态图
②
活动图
③
顺序图
④
协作图
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