现在学生上网（get on-line）成风，下周班会，老师将谈论有关问题。假设你是老师，请根据下面提供的内容写一篇80词左右的讲话稿，要点必须齐全。
好处：1.帮助学习；2.获得更多信息，了解世界；3.玩游戏，使人放松并更聪明。
坏处：1.上网时间长，有害健康；2.网上交友，学习时间少，学习越来越差。
建议：1.在校学习时，不上网；2.周末和假期可上网，但时间不要太长，每天一、两个小时。
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
_____________________________________________
Good afternoon, class. Today let’s talk about getting online. Many students like getting online very much. They can learn how to use the modern machine-computer. They can get more information. It can make them clever to play different kinds of games. But some students spend too much time in playing games. Some even make friends online. They write too many letters to each other. It takes them too much time. So they do worse and worse in their lessons. I think they mustn’t get online when they are studying at school. They can do it in summer or winter holidays.
题目分析：这是一篇给材料的讨论稿。讨论稿是以议论为主要表达方式并对客观事理进行分析评论，表达作者的见解和主张的一种文体。讨论稿在语言运用上突出的特点是说理性。由于讨论稿是直接表达作者的看法和主张的，它在写法上要举出正确而典型的事例，证明这些看法和主张是正确的。在做题时允许有记叙和描述，但这些记叙和描述都只能是说理的辅助手段，不能喧宾夺主。讨论稿要有讨论的中心论点，
【亮点说明】这篇短文中心明确，语言准确，没有语言错误。