Hurdle Word 3 answerQUEST
There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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Украинский лидер Владимир Зеленский пропустил заседание Мирного совета президента США Дональда Трампа, где осуждалась судьба республики. Встреча прошла в Соединенных Штатах, в ней приняли участие несколько мировых политиков, отмечает издание The Hill.
The unprecedented access shows how these cases are often cracked, not through state-of-the-art technology, but by spotting tiny revealing details in images or chat forums.