Students, do you know why airplanes fly? Do you know why the telephone can make people far away talk to each other? Do you know why computers can meet people all over the world on computers through the Internet? You can buy it if you want to know the correct answer.

The name of this book is "Thousands of Why", which contains science, geography and history. It is rich in content and interesting in knowledge. Every page has color pictures. If you encounter words that you can't understand, you can look at Pinyin, learn more words, and have arrows to tell you the direction.

I have read this book completely, more than three times, but I still can't get tired of reading it, because its articles are not long, and I can give examples, write explanations, vivid images, and make people understand and learn. Not only that, there are many information and famous sayings about scientists. For example, success depends on 100% sweat and 1% effort.

Once, I just opened a page and opened a telephone class. I read the question of why the microphone makes sound with me carefully. When I finished reading, the problem was solved. I know that the telephone was actually invented by four scientists, but the telephone wouldn't have been born in 1876 if Mr. Bell of Scotland hadn't turned the screw by a quarter. A telephone can make sound by electric current. There is a thin carbon plate in the microphone. The sound will make the carbon plate in the microphone vibrate and promote the change of current. This is the principle of the telephone. Is it easy to understand?

Students, do you want to know more about extracurricular knowledge? Read this book if you want! This book has both scientific principles and natural mysteries. I think the wonderful content in this book will certainly attract you very much.