چکیده جنس quercus از خانواده (fagaceae) شامل 7 گونه در ایران است. این گیاهان دارای ارزش اقتصادی و دارویی اند. 3 گونه از این جنس در جنگل های زاگرس توزیع شده اند، در این پژوهش مورد بررسی واقع شده اند: lindl. q. brantii، q. libani oliv ، q. infectoria oliv . در این پژوهش در مجموع 17 واحد جمعیتی، از این گونه ها جمع آوری و بررسی شدند. تنوع ریخت شناسی به روش سنتی و با روشهای هندسی و نیز تنوع ریز ریخ...

the aim of this study has been to find answers for the following questions: 1. what is the effect of immediate correction on students pronunciation errors? 2. what would be the effect of teaching the more rgular patterns of english pronunciation? 3. is there any significant difference between the two methods of dealing with pronuciation errore, i. e., correction and the teaching of the regular ...

although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...