48. What did the author find in his study about the effect of online social interactions?
- A. It differs from employee to employee.
- B. It tends to vary with the platform used.
- C. It has much to do with whom employees interact with.
- D. It is hard to measure when employees interact with outsiders.
答案：C
答案句：I found employees who engage in online social interactions with co-workers through social media blogs tend to be more motivated and come up with innovative ideas. But when employees interact with individuals outside the organization, they are less motivated and show less initiative.
参考译文：我发现，通过社交媒体博客与同事进行在线社交互动的员工往往更有动力，并能提出创新想法。但当员工与组织外部的人互动时，他们的动力和主动性都会降低。
定位线索：题干“effect of online social interactions”→答案句“online social interactions”；文中“with co-workers”和“with individuals outside the organization”对应选项C“It has much to do with whom employees interact with”（与员工互动对象有很大关系），其中“whom employees interact with”与“with co-workers”和“with individuals outside”对应。
解析：题干问在线社交互动的影响，答案句对比了与同事互动和与外部人员互动的不同效果，说明影响取决于互动对象，对应选项C。选项A“因人而异”在原文未提及；选项B“因平台而异”原文未涉及不同平台比较；选项D“难以衡量”与原文明确描述效果不符。
50. What does the author suggest managers do to neutralize the retention risk?
- A. Give promotions to employees for their accomplishments.
- B. Create opportunities for employees to share success stories.
- C. Acknowledge employees' achievements through social media.
- D. Encourage employees to increase their visibility on social media.
答案：C
答案句：Managers can also use social media to directly reduce turnover (跳槽) intentions, by recognizing employees' accomplishments and giving visibility to employees' success stories.
参考译文：管理者还可以利用社交媒体直接降低员工的跳槽意愿，通过认可员工的成就并让员工的成功故事得到展示。
定位线索：题干“neutralize the retention risk”→答案句“reduce turnover intentions”；文中“recognizing employees' accomplishments”对应选项C“Acknowledge employees' achievements through social media”（通过社交媒体认可员工的成就），其中“recognizing”与“acknowledge”为同义改写，“accomplishments”与“achievements”为同义改写。
解析：题干问作者建议管理者如何消除留存风险，答案句明确建议通过社交媒体认可员工成就来降低跳槽意愿，对应选项C。选项A“给予晋升”在原文未提及；选项B“创造分享成功故事的机会”与原文“giving visibility to success stories”不完全一致，原文强调展示而非分享；选项D“鼓励员工提高可见度”偷换概念，原文是管理者给予员工可见度，而非员工自己提高。