随着科技的进步，越来越多的青少年拥有了自己的智能手机。假如你是八年级一班 的班长李华，你打算发表一篇关于使用智能手机的演讲。请你根据提示内容，写一篇演讲稿。
1.使用情况：在一班，80%的同学有智能手机，50%的同学每周花超过2小时看短视频
2.过于依赖手机的危害：①不利于身体健康②……
3.你的建议：①控制玩手机的时间②……
4.提出呼吁：希望大家合理使用智能手机
写作要求：
1.文章必须包含所有提示内容，并可作适当发挥；
2.表达清楚，语句通顺，意思连贯，书面规范；
3.文中不得出现真实姓名和校名；
4.字数要求80词左右（开头和结尾已给出，不计入总词数）。
参考词汇：short video 短视频

    Good afternoon，everyone.Thank you for listening to my speech.Today I am going to talk about the problem of using smart phones in our class._________
    Thank you for your time.

【考点】演讲稿；日常生活．

【答案】Good afternoon，everyone.Thank you for listening to my speech.Today I am going to talk about the problem of using smart phones in our class.In our class，more and more students go to school with mobile phones.80% of students have smart phones，and 50% of students spend more than 2 hours a week watching short videos.
However，there are some problems with using mobile phones，one of which is that the ring of phones can disturb teachers and students in the classroom.This is not good for our health，especially for our eyes.Some students prefer to surf the Internet to search for the answer rather than think it by themselves even when they do their homework.Some use the smart phone when they crossing the street.As we all know，thesmart-phone can store a great deal of information，which makes our memory worseand worse.They can't listen to teachers in class carefully.
I think we should control the time of playing mobile phones.We should do more outdoor sports.We should communicate more with friends and parents.We hope that we can use smart phones rationally and not rely on them.
Thank you for your time.