小学英语演讲稿1分钟的自我介绍
Today, I want to talk about computer virus. One might think of a computer virus as a tiny computer program designed to perform mischief. Most computer users have heard about computer viruses. A computer virus is the result of a destructive program that someone has written and placed inside a computer program, which unsuspecting people then place in their computer system. Some viruses can erase all the information from the place where it's stored on the computer's hard disk. But each virus is different. Some display strange messages on your computer screen; others make small changes in your computer programs. Where do these viruses come from? They certainly don't float around in the air like some human viruses. Instead, like any other computer program, a human must create them. Why do people create them? It's hard to say. Some people create these programs out of meanness to get even. While others create them just as a challenge. Why do you thing people create these very destructive programs? How does your computer get a virus? Almost exactly the way humans do. The computer gets exposed to one. Well, its not quiet that easy. Many people get contaminated computer programs by trading programs with other people. Others get contaminated computer programs through the use of modems, which allow computers to communicate over telephone lines (ie. The Internet) Most of the time, programs that arrive by modem or a trade are perfectly safe to use. However, you do stand a chance of getting a program that has been tampered with. Here a computer program virus is hiding inside the normal program. Many computer programs that are traded were copied illegally. When this program enters your computer through your input device, it hides in your computer's memory and starts to duplicate itself like a disease. When you save your data, you also save the virus. Slowly but surely, the virus crowds out your data and causes major system problems. The virus can't affect the computer's ROM (Read Only Memory), but it can affect RAM (Random Access Memory) and your computer disks. When your shut off your computer a virus that has been picked up will be lost, just like any other memory that is held in RAM. If the virus is on your disk or hard drive, it will return to the computer when you use the program again. If you switch from one program to another without shutting down the machine, the virus will attach itself to the new program. In this way, it can slowly infect all your programs before you know that it exists. Today millions of dollars are being spent to rid and protect computer systems from these virus programs. Commercial and shareware programs have been created with the sole purpose of detecting and fixing suspect programs that might be viruses infected. These detection programs should be ran when any disk is put into your disk drive or every time your computer is first started up each day to scan the computer's hard drive
小学生英语演讲稿:我的好朋友
I am a student.I live in chongqing,china.I am (你的名字）.I am （你的年龄）years old.my birthday is （你的生日）.And I am a healthy boy(girl).because I exercise every day and eat healthy food,fruit every day.And my favorite food is potato.I also like animals.My favorite animals are (你喜欢的动物）.And I often go to the zoo to see them.My father is a teacher,my mother is a teacher,too.So I want to be a teacher.I think it is a nice job.And my family are friendly.l love my family.我是以个学生。
我住在中国的重庆。
我叫。
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。
我。
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岁了。
我的生日在。
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我是一个健康的男孩（女孩）。
因为我每天锻炼和吃健康食物，水果。
我最喜欢的食物是土豆。
我也喜欢动物。
我最喜欢的动物是。
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。
我经常到动物园去看他们。
我的爸爸是一个老师，我的妈妈也是个老师，所以我也想当一个老师。
我认为这是一个好职务。
我的家人都十分有好。
我爱我的家。
小学生英语演讲稿
这个我觉得要自己写更真实
