Подчеркните в предложениях субъектный инфинитивный оборот, переведите предложения на язык. 1. water is certain to be a good conductor of electricity. 2. the fire was reported to be extinguished by co2 fire extinguishers. 3. a combustion leading to flame propagation is known to be a chain reaction. 4. water is considered to be the most common extinguishing medium. 5. modern dry powders are said to be as complex as vapourizing liquids.