Why isn''t wood weaker that it is? Why isn''t steel stronger? Why does glass sometimes shatter and sometimes bend like spring? Why do ships break in half? What is a liquid and is treacle one? All these are questions about the nature of materials. All of them are vital to engineers but also fascinating as scientific problems. During the 250 years up to the 1920s and 1930s they had been answered largely by seeing how materials behaved in practice. But materials continued to do things that they..
"New Headway English Course" is a development of the highly successful multi-level Headway series. The original coursebooks have been rewritten to include new features,..Подробнее
"The New Cambridge English Course" is a four-level course for learners of English. Level 4 takes learners from intermediate to a good upper-intermediate standard (approximately at..Описание
Skin lesions are responsible for the inability to work for more years than cancer, cardiovascular diseases and vascular accidents together. Therefore, the necessity of carrying..Описание
"New Headway: Upper-Intermediate: Student`s Book" takes the successful "Headway" series into an exciting new era. It introduces new features to challenge adult and young adult..В корзину Подробнее
New Headway English Course takes the successful Headway series into an exciting new era. It introduces new features to challenge adult and young adult intermediate students and..Описание