The role of the book

Gorky once said: "Books are the ladder of human progress." I did not believe that books really have such great use. I believe it until one thing happens. The book, like a key, opened the door to knowledge and made me see a beautiful world.

One day, I was in class, the teacher used the projector and we were in class, and it was on, and there was a question mark in my heart. How did the projector zoom in and then project it on a white wall?

When I got home, I hurriedly took out the book and looked for it with eager eyes. This is not, but I didn't. After taking out the third book, my question mark gradually disappeared and disappeared a little. Oh! It was originally carried out using the principle of convex lens imaging. Adjusting the distance between the object, the lens, and the screen, we can get different sizes on the screen to complete! Since then, I know that reading can increase knowledge, and I love reading more.

Not only that, but I also found several "golden houses" from the book. The "Golden House" also brought me a lot of knowledge, such as "the principle of sedimentary rock generation", "the most expensive stone - diamond", "diamond" The formation process" and so on.

The book, like a boat, takes me to the sea of ​​knowledge; the book, like a wise man, tells me a personal reason; the book, like a good teacher, grows up with me... the book, brought it to I know!

A fifth grade of Duanzhou District, Zhaoqing, Guangdong: Zeng Chudan