题目内容
Another recent news story told of a man who spent so much time online that he didn't sleep enough to keep his job.
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One student not only failed, but lost 12 pounds.
It is easy for those who are unaffected by the powerful draw of connectivity - those who can easily control their time online - to view Internet addiction as an imaginary problem or to attribute its origins to a weak personality.
The Internet is a powerful tool, but make sure that you use it wisely for all the good value it offers and that you won't let too much of a good thing become something bad.
海水之所以是咸的（含盐量很高）是因为：
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