你校下周將舉行英語周活動。假如你是李華，你被推薦作為活動的發(fā)言人。請你根據以下提示，寫一篇英語演講稿，向同學介紹人類歷史上一項重大發(fā)明——電腦。
要點：
（1）電腦是世界上最偉大的發(fā)明之一，它改變了世界和人們的生活；
（2）優(yōu)點：電腦計算速度比我們快，而且?guī)缀鯊牟怀鲥e；電腦可以做重要的工作，比如開飛機等；
（3）缺點：長時間使用電腦對眼睛不好……（至少補充一點）；
（4）你的看法。
要求：
（1）0詞左右。開頭和結尾已給出，不計入總詞數內；
（2）文中不得出現真實姓名和校名；
（3）可適當增加細節(jié)，以使條理清楚、行文連貫；
（4）標點正確，書面整潔。
參考詞匯：advantage 優(yōu)點 disadvantage 缺點
   Hello everyone!I'm Li Hua.It's my great honor to introduce an important invention to you.______________
  That's all!Thank you!

【考點】說明文；科普知識與現代技術．

【答案】    Hello，everyone!I'm Li Hua.It's my great honor to introduce an important invention to you.
   The computer is one of the greatest inventions in the world.They have changed the world and played an important role in our daily life.People can shop online if they don't want to go out.What's more，they can help solve problems and make students learn more.Computers calculate faster than we do，and they almost never make mistakes.Computers can do important work，such as flying planes and so on.Students can watch English videos and learn spoken English.But there are some disadvantages.On the one hand，using computer for a long time is bad for eyes.On the other hand，bad information on the Internet can affect students' study easily.
   In my opinion，it is important for us to use computers properly.Parents can manage students' online time and content more.
   That's all!Thank you!