99 ejercicios resueltos de oraciones - Morfología y sintaxis

Las vidas del Dr. Bethune complementa otras muchas investigaciones previas llevadas a cabo tanto por los Stewart como, en el caso español, por Jesús Majada, comisario de la exposición La carretera Málaga-Almería, visitada por casi cinco mil personas en la Universidad de Salamanca en octubre de 2006. En palabras del profesor Rodríguez Celada, director de la colección editorial “Armas y Letras” y autor del prólogo, nadie podía permanecer indiferente ante “el genio extemporáneo, el líder indiscutible, el adalid temerario, el jefe autoritario, el paladín romántico, un ser...

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

One of the most popular narrators of his time, Arthur Conan Doyle, was a visionary man with attitudes which were far ahead of his time. In this book we will know in depth his biography, his work, beyond the creation of the illustrious Sherlock Holmes, and his spiritualistic inquisitiveness.

This starter volume uses everyday examples such as a baseball and a beach ball to demonstrate the contrast between hard and soft objects.