A、the elementary row operation of interchanging the first and second rows.
B、the elementary row operation of interchanging the second and third rows.
C、the elementary column operation of interchanging the first and second columns.
D、the elementary column operation of interchanging the second and third columns.
第4题
下列全部属于结构图的组图是()。
A.用例图、类图、顺序图、部署图
B.类图、组件图、部署图、活动图
C.用例图、对象图、状态图、组件图
D.类图、对象图、组件图、部署图
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