The Ten Thousand Whys Every Chinese Elementary School Student Wants to Know: Science and Technology

Author: Xi Shi
Publisher:
Publishing Time: Not Available
Features: Rapidly developing technology is changing the entire world, with ever-evolving transportation and weapons, expecting the beauty and peace of tomorrow. With its simple and easy-to-understand text and exquisite, interesting images, this book will help you solve your questions: Why don't you fall off when riding a roller coaster? Why are "traffic lights" installed on airplanes? Why does a gas mask look like a pig's mouth? Why do tear gas canisters make people cry?