(4) With the exception of hoses used to extinguish fires, any hose connected to. a fire hydrant must be equipped with either an approved backflow prevention. device or an approved four (4) inch air gap, unless in the Department's opinion, the application does not pose a backflow hazard, such as watering a community.
What was most likely the cause of Marie Curie's leukemia? a. Radiation c. Pollution b. Smoking d. Genetics. a. Radiation was most likely the cause of Marie Curie's leukemia.
Fun Facts about Madame Curie for Kids. 1  Marie discovered radium and polonium. 2  Marie and her husband won a Nobel Prize for their work. 3  Marieâs family ran a secret school. 4  Marieâs sister, Bronia, became a doctor â something unheard of for women then. 5  Marieâs husband, Pierre, was a scientist too.