上課的前奏作文400字
ladies and gentlemen,
i have had a lot of teachers in my school who have given me much help in my study. for their help i will never forget them. but today i am going to talk about a special teacher of mine. this teacher is not a human being and its name is“computer”. it has been teaching me a lot of knowledge and i appreciate it very much.
how can i interact with a computer? there are many ways, including keyboard, mouse pointer, and touch screen. i often use a keyboard. when i press right keys, i can see and hear whatever i want. information world is at my fingertip. i wish that true speech input-output system would be invented one day.
as teachers,computers have a lot of virtues： they are positive, they have good memories and never lose any information stored in them.they have much knowledge in every field.they can let out all kinds of sounds, and can also improve the efficiency of our study.for example,if i want to,i can skip some chapters so that i can study at my own pace.
although computers will never take the place of human teachers, they are welcomed by more and more learners.computers will continue to evolve(發展)with the aid of modern technologies.computers are so powerful, helpful and important that everybody needs it, especiallyinthefuture!i lovemycomputer teacher!
thank you.
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