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From the publisher:

The purpose of this newest reference book is to help applicants prepare quickly and effectively for the external independent testing, and students of grades 9 and 11 - for the state final examination. It is believed that in today's rapidly developing technology, printed books cannot always compete with computers in terms of ease and convenience of use. The proposed handbook denies this opinion, because due to its clear structuring and visual information system, it can meet your needs - provide an opportunity to work comfortably with the book. For this purpose, each page has a plate at the top consisting of the following "bookmarks": "Theory", "Practice", "Tests", "EIT tasks", etc., which are updated according to the type of work to be performed in a particular part of the handbook.