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What.s the finding of the research undertaken at Carnegie Mellon University?



A)
People spend more time on the Internet now.
B)
People spend less time with their families and friends now.
C)
The Net proves socially healthier than television.
D)
Internet use may cause a drop in psychological health.

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出自：华北水利水电大学-水利水电建筑工程-大学英语2

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