Técnico electricista 4 - Corriente alterna

The United States has many places to live. People choose to live in small towns and big cities. Why do people live where they do? With examples from both the past and present, this Spanish book teaches beginning readers about the history of immigration to the United States and the factors that influence where people live. Dynamic images in conjunction with Spanish text provides first grade students with an inviting learning experience as they build their reading skills and knowledge of US history.

En estos tiempos tan convulsos en los que la humanidad se encuentra afectada por una pandemia que va aniquilando gran parte de los habitantes del planeta, el doctor Roberto Gutiérrez Laboy reflexiona cuidadosamente, desde la perspectiva de la bioética, sobre cómo enfrentar situaciones tan trágicas como las que se están viviendo. Su finalidad es que se comprenda que las tragedias humanas son parte consustancial de nuestra existencia radicalmente problemática.

Learn about the rich history of Mission Santa Cruz: how it started, the people who ran it, the indigenous population, and its legacy today.

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these pterosaurs face-to-face: The Quetzalcoatlus had wings that spanned the length of a school bus! The Dsungaripterus had a bony crest on its head! The Eudimorphodon had a diamond-shaped flap at the end of its long tail! Plus you'll ...