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We use machines every day to make our work easier. The compound machines that we use are oftentimes made up of multiple simple machines such as pulleys, levers, and inclined planes. Each simple machin ...
A lonely cat meets a new friend in a traffic jam.
It is an ebook from The International Children's Digital Library, a project of the ICDL Foundation in collaboration with the University of Maryland's H ...
Aggiungere a Didactalia Arrastra el botón a la barra de marcadores del navegador y comparte tus contenidos preferidos. Más info...
