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The main purpose of the author is to introduce to students how to have an effective study.

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Y
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13:00起床，吃中饭14:00去网吧玩网络游戏17:00晚饭网吧叫外卖；开始通宵练级9:00 next morning回宿舍休息上表为高校一个大学生的作息时间表，说明反映的现象 2．产生这一现象的原因及其危害 3．如何解决该问题 Computer Game Addiction
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According to the passage, static electricity can be caused by ______.
A．using home-made electrical goods
B．wearing clothes made of natural materials
C．walking on artificial floor coverings
D．copying TV programs on a computer
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