Віртуальний клас. Веб-камера портрет жінки, що сидить за робочим столом вчителів і пояснює нову тему. Математичний викладач дає онлайн-урок, вказуючи на дошку і навчаючи студентів, як вирішити задачу геометрії - Стокове фото та зображення

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