مرداد 29, 1399
.This lesson is based on the latest advice from WHO, March 2020 to watch the lesson click the link below https://educationsaveslives.org/OL/C19.html
مرداد 29, 1399
Coronavirus, The total number of confirmed cases
:source https://covid19.who.int/
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مرداد 22, 1399
مرداد 15, 1399
