Who was the first to create a submarine?
Perotsky announced his invention in the same magazine
which radiation was developed by Ivan Pulyus
if someone appeared, a bonfire was lit
the waste of which was converted into environmentally friendly fuel
which spare part for the rocket was developed by Korolev
в якому році ігор Сікорський винайшов гелікоптер
Leonard Smirnov developed a method of extracting something from seawater
Створюйте онлайн-тести
для контролю знань і залучення учнів
до активної роботи у класі та вдома