the skill of reading in english as a foreign language is an important and challenging one which is affected both by linguistic and extra linguistic factors. since vocabularies are part and parcel of every reading comprehension text, knowing enough vocabulary always facilitates this process. however, guessing strategy as one of the most important strategies has consistently ignored by language l...

efl/esl textbooks have been regarded as essential language teaching materials with which the learners spend about 70 up to 90 percent of their class time. the important role they play and their vast use make them not only influential in learning the language but also in shaping values and attitudes. put it another way, textbooks socialize learners using their contents (i.e. texts, illustrations...

چکیده: در این تحقیق امکان سنتز مشتق جدیدی از یک کتودی آزیریدین از طریق آمیناسیون1، 2، 4، 5 – تترابرومو ،1، 5 دی فنیل پنتان3- اُن مورد بررسی قرار می گیرد. (1e,4e) -1,5- diphenylpenta -1,4- dien -3- one 1,2,4,5 – tetraboromo, 1,5 diphenylpenta -3-one bis (3-phenylaziridine -2 - yl) methanone