业务流程图（Transaction Flow Diagram，TFD）是业务流程调查结果的图形化表示，它反映现有系统各部门的业务处理过程及其之间的分工与联系，以及连接各部门的（ ）的传递和流动关系，体现现有系统的边界、环境、输入/输出和数据存储等内容。某公司的系统分析师进行系统分析后，得到了系统“员工领原材料”的业务流程描述：员工填写领料单，库长批准领料单，库工查询存库账，如果发现缺货则通知采购人员，采购人员通知供货单位补充货物，最终向员工提供原材料。使用TFD描述这一流程时，“供货单位”应该表示为（ ），“员工”应该表示为（ ）。
问题1选项
A.信息流
B.控制流
C.功能流
D.业务流
问题2选项
A.外部实体
B.业务处理单位
C.参与者
D.数据处理
问题3选项
A.外部实体
B.业务处理单位
C.参与者
D.数据处理
正确答案及解析
正确答案
解析
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