Author: Xi Shi
Publisher:
Publish Date: 2005-11-01
Features: Rapidly developing technology is changing the entire world, with ever-evolving transportation and weapons, expecting a better and peaceful tomorrow. With its simple and easy-to-understand text and exquisite, interesting images, this book will help you unravel your questions: Why don't roller coasters fall off? 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?
The Ten Thousand Whys Every Chinese Elementary School Student Wants to Know: Science and Technology
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