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There is an old saying，“All work and no play makes Jack a dull boy”．So we have to face the Internet fairly.We should learn to use it correctly.First，we should learn the common sense of safety.Before we do everything online，we should think twice.Then，we should try to protect ourselves.We’d better not chat with some strangers.The most important thing is that we must not leave our address and some information about us and our family.
Unit 4 Cyberspace
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