如果使用DFD对某企业的财务系统进行建模，那么该系统中（ ）可以被认定为外部实体。
- A.转账单
- B.转账单输入
- C.接收转账单的银行
- D.财务系统源代码程序
正确答案及解析
正确答案
解析
外部实体：指不受系统控制，在系统以外又与系统有联系的事物或人，它表达了目标系统数据的外部来源或去处。外部实体也可以是另外一个信息系统。本题中接受转账单的银行应是外部实体
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