68 ejercicios resueltos de ajustes de reacciones químicas

Esta obra se compone de fichas que explican los contenidos de la lengua inglesa de una forma pedagógica, que facilitan el aprendizaje al máximo. La autora es una psicóloga experta en el tratamiento de dificultades del aprendizaje con una amplia experiencia docente. COULD 1. Afirmativa y equivalente en español. 2. Negativa y equivalente en español. 3. Interrogativa y equivalente en español. 4. Respuestas cortas y equivalente en español. 5. Usos con ejemplos.

Biographies and bibliographies of members are included in many of the volumes. Lists of members are usually given on covers of the numbers.

The Smart Neanderthal casts a new light on the Neanderthals and the "Cognitive Revolution". Finlayson argues that there was no revolution and, instead, modern behavior arose gradually and independently among different populations of Modern Humans and Neanderthals, raising questions about who we really are.

The only comprehensive treatment available, it will be the definitive resource for amateur naturalists as well as professionals with an interest in this rapidly changing biogeographical region.

Presented as a catalogue, the authors provide complete and true information about endangered Mexican Freshwater fishes. A physical and ethological description, the reason of its involvement in the book, preservation state, natural history and ecology, as well as a map with its geographical location in Mexico, and a picture of the specie is provided for each fish. This book is a start point for the knowledge and preservation of the richness of this biological group.