2014下半年信息系统项目管理师综合知识真题试题与参考答案

The main types of social networking services are those that contain category places (such as former school year or classmates), means to connect with friends (usually with self-description pages), and a recommendation system linked to （

）.
A、net
B、interests
C、others
D、trust

信管网参考答案：D

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