题目内容

以下参与者特点不正确的是

A. 必须在系统之外
B. 可以是系统的一部分
C. 是与系统发生直接联系的人或事物
D. 参与者与系统的交互是有意义的

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参与者必须是人。

A. 对
B. 错

用例可以不与任何参与者发生联系

A. 对
B. 错

用例图里的关联关系必须有方向。

A. 对
B. 错

Which of the following is NOT true according to the video?

A. Children are often exposed to junk food ads while wathing TV.
B. With the help of teachers, children are able to resist the marketing ads.
Companies are trying to do a great job selling their products.
D. Companies are trying to make their ads entertaining and memorable.

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