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Cyr3 why do bridges arch?

[Libro de texto]
CAMBRIDGE
08 / 2010
Otros
Inglés
Otros
9780521137171
Inglés
CAMBRIDGE YOUNG READERS
Lecturas en lenguas extranjeras

Sinopsis

A series of twenty non-fiction science readers which engages children in the world around them. What holds up skyscrapers? Why are sports domes curved? Why are triangles used in many bridges? You can find the answers to these and other questions about structures in Why Do Bridges Arch?