[解析]
(1)细节理解题。根据文章第一段A team of communication professors from the Brigham Young University discovered that people using the social media platform Facebook can be divided into four different categories (类别).Their findings basically tell us why an average of 1.28 billion people check their Facebook every day,with most users spending about 35 minutes daily on Facebook. (Brigham Young大学的传播学教授团队发现,使用社交媒体平台Facebook的人可以分为不同的四类。他们的研究结果基本上告诉我们,为什么平均有12.8亿人每天查看Facebook,大多数用户每天在Facebook上花35分钟)可知,我们可以从第1段中了解到大多数用户每天都会访问Facebook。故选A。
(2)细节理解题。根据文章第二段To identify (鉴定) different kinds of Facebook users,the researchers made a list of 48 reasons why people use Facebook.They then asked study subjects to report their personal connection to the reasons,rating each from "most like me" to "least like me".To get a better understanding of them,the researchers interviewed each subject. (为了鉴定不同类型的Facebook用户,研究人员列出了人们使用Facebook的48个原因。然后,他们要求研究对象报告他们与这些原因的个人联系,从"最像我"到"最不像我"对每个人进行评级。为了更好地了解他们,研究人员采访了每位实验对象。)可知研究人员要求受试者解释他们为什么使用Facebook。故选C。
(3)细节理解题。根据文章第四段Relationship builders and selfies often post pictures,videos and text updates on their Facebook.Relationship builders post mainly to further strengthen the relationships they have beyond the virtual (虚拟的) world.Selfies are more focused on getting attention,likes and comments. (人际关系建立者和自拍者经常在他们的 Facebook上发布图片、视频和文本更新。关系建立者发布主要是为了进一步加强他们在虚拟世界之外的关系。自拍者更注重获得关注、点赞和评论。)可知建立关系和自拍的区别是自拍旨在获得他人的更多关注。故选B。
(4)主旨大意题。文章开头点明主题,即使用社交媒体平台Facebook的用户可分为四个不同的类别,而文章后面的段落都是围绕此主题来进行阐述的,故选项D"Researchers have identified four kinds of Facebook users (研究人员鉴定了四种Facebook用户)"是本文主旨。故选D。