I Wonder Why Zips Have Teeth and Other Questions About Inventions (平裝)

內(nèi)容概要

This introduction to the world of inventions answers questions including: which computer was as big as a bus?, why are bears called teddies? and what did people use before fridges? 
 
length: (cm)21.7    　　　            　　　　　            　　　　　 width:(cm)17.7

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