400 words, write an expository essay for the computer, now for it, thank you! 5

For example, BAI

If it's faster than a calculator, then the DU is the computer

Computers can not only do math calculations, but also have a lot of other functions.

The computer is composed of two parts, one is the main chassis and the other is the display screen. If one of these parts is missing, the computer won't function properly. Among them, the main chassis is the most important, because all the files stored in the main chassis are the most important files of the owner.

If the main chassis is taken away, the most important files on the machine will be lost.

The shape of the computer is basically square, and now the latest night crystal computer is very thin, very light, and there is a kind of computer that can be carried around, the computer is relatively small, there is no main chassis, but it is more difficult to control than others, this kind of computer is called a "laptop", and the colors of the computer are white, black and gray, these three colors are the most common.

Computers have many uses and functions. The computer can store many files, you can keep a diary, check information, print information, surf the Internet, chat and so on. Computers must be expensive with so many functions, and computers with so many "treasures" are naturally so expensive.

Computers have so many features, but also many disadvantages. There are many college students, elementary school students, and even adults who are attracted to computers and are obsessed with the Internet. So, I'm here to remind you all:

There are advantages and disadvantages to computers, and when using computers, you must use them in moderation.

Society is developing, the country is progressing, and the motherland is looking forward to us creating better things.

Computers are well-known electronic products, but they are not

It's everybody who understands computer daos, and then I'm going to.

version introduces you to computer rights.

On the whole, computers are divided into two parts, one is the hardware system, and the other is the software system.

Hardware systems are things that can be seen and touched. They are monitors, keyboards, mice, speakers, cameras, consoles, etc. There are power switches, reset buttons, hard disk indicators, and power indicators on the main unit.

The power switch is the largest button on the host, and its function is to switch on and off the computer; The reset button usually restarts when the computer crashes; The power indicator is a small green light that will stay on after turning on the computer; When reading and writing data on the hard disk, the hard disk indicator will light up, which indicates the working condition of the hard disk.

The software system cannot be seen or touched, it controls all kinds of information in the computer, just like all kinds of knowledge that exists in our brains.

Software and hardware are two inseparable parts from each other, and without whom, the entire computer cannot be used. Therefore, software is very important to computers, and it is indispensable. No matter how good your computer is, if you don't install software on it, it's a pile of broken metal.

Computers are very versatile. It's like a teacher who knows a lot of knowledge, and when we encounter a topic we don't understand, we can go online and "ask" it. It is both a teacher and a friend. When we are bored, we can play games and listen to ** on the Internet.

Students, after listening to my introduction, do you know more about computers?

A revelation of a small thing.

In life, many things happen every day. Some of them are like a cloud of smoke, and they are quickly forgotten. And some things will be deeply imprinted in my mind and linger.

That was one thing that happened before the final exams last year.

Since the final exam is approaching, every day is nothing but revision. I felt like I was well versed in revision, so I was a little absent-minded, and I didn't pay attention to the practice questions at all.

When the teacher asked us to write two ancient poems and two famous quotes, I quickly finished writing them silently. But when the book was sent, I was stunned - "56" points? I suspect something is wrong with my eyes!

Because since I was a child, my grades have basically been "excellent", how can I have such bad grades? If you look closely, it turns out that I wrote the content of the two ancient poems upside down, and those two famous sentences didn't even write the author's name! I was so depressed!

After returning home, I quietly reflected: Why did I get this failure? Why? There is only one reason, and that is the result of my complacency. Luckily, from this one incident, I found my problem in time and got a good score in the final exam.

In my school life, it was a small thing. Although this incident has passed a long time ago, it has taught me a great lesson. It taught me that one should never be complacent – pride will make you lose your mind, and complacency will lead you disoriented.

In the future, I will firmly remember that humility makes people progress, and pride makes people backward.

Magical Chinese One day, I begged the Buddha to make my family healthy. The Buddha said, "Only four days," I said

Okay, spring, summer, autumn, winter" The Buddha said, "Not for three days" I said, "Okay, yesterday, today, tomorrow."

The Buddha said, "No! Two days," I said, OK.