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The inspiring stories of 5 people who changed history.
The inspiring stories of 6 people who changed history.
The inspiring stories of 6 people who changed history.
Collins Skills for TOEFL is a two book series (1 Listening/Speaking, 2 Reading/Writing) to help students prepare for the &′Test of English as a Foreign Language&′, used by over 7,500 institutions in 130 countries as a measure of language ability. To date 25 million students have taken the test around the world.
Ten strangers are invited to a grand house on an island off the south coast of England. Their host has not arrived, but a mysterious voice on a gramophone record accuses each of them in turn all have committed murder. One by one they die, until there are none... Detective English is a series of classic detective stories, specially graded for foreign learners of English. And Then There Were None is suitable for pre-intermediate students. Each title in the series features : the simplified English text with cartoon illustrations ; Activity pages, including comprehension work, summary writing, grammar revision, vocabulary games and pronunciation tasks ; a glossary to help students with difficult : words ; a cassette containing a dramatised mailing of the story.
The story of Oliver Twist - orphaned, and set upon by evil and adversity from his first breath - shocked readers when it was published. After running away from the workhouse and pompous beadle Mr Bumble, Oliver finds himself lured into a den of thieves peopled by vivid and memorable characters - the Artful Dodger, vicious burglar Bill Sikes, his dog Bull's Eye, and prostitute Nancy, all watched over by cunning master-thief Fagin. Combining elements of Gothic Romance, the Newgate Novel and popular melodrama, Dickens created an entirely new kind of fiction, scathing in its indictment of a cruel society, and pervaded by an unforgettable sense of threat and mystery.
Compared with STEM fields, foreign language (FL) education and second language acquisition have only slowly embraced open education and the new knowledge ecologies it produces. FL educators may have been hesitant to participate in the open education movement due to a lack of research which investigates the benefits and challenges of FL learning and teaching in open environments. This book contextualizes open education in FL learning and teaching via an historical overview of the movement, along with an in-depth exploration of how the open movement affects FL education beyond the classroom context; fills the research void by exploring aspects of open second language learning and teaching across a range of educational contexts; and illustrates new ways of creating, adapting and curating FL materials that are freely shared among FL educators and students. This book is open access under a CC BY ND licence.
This book, written for both seasoned and novice researchers, presents a theory of what is called Basic and Higher Language Cognition (BLC and HLC), a theory aimed at making some fundamental issues concerning first and second language learning and bilingualism (more) empirical. The first part of the book provides background for and explication of the theory as well as an agenda for future research, while the second part reports on selected studies of language proficiency in native speakers, as well as non-native speakers, and studies of the relationship between literacy in a first and second language. Conceptual and methodological problems in measuring language proficiency in research on second language acquisition and bilingualism are also discussed. Further, the notion of levels of language proficiency, as rendered by the Common European Framework of Reference for Languages (CEFR), is critically examined, suggesting ways of empirically investigating a number of questions that the CEFR raises but is not capable of answering.
Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Now, the future has arrived. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and Hall thrusters. The authors provide an introduction to plasma physics in order to allow readers to understand the models and derivations used in determining electric thruster performance. They then go on to present detailed explanations of: Thruster principles Ion thruster plasma generators and accelerator grids Hollow cathodes Hall thrusters Ion and Hall thruster plumes Flight ion and Hall thrusters Based largely on research and development performed at the Jet Propulsion Laboratory (JPL) and complemented with scores of tables, figures, homework problems, and references, Fundamentals of Electric Propulsion: Ion and Hall Thrusters is an indispensable textbook for advanced undergraduate and graduate students who are preparing to enter the aerospace industry. It also serves as an equally valuable resource for professional engineers already at work in the field.
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