(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.
Marie Curie. Marie Curie discovered two new chemical elements â radium and polonium. She carried out the first research into the treatment of tumors with radiation, and she was the founder of the Curie Institutes, which are important medical research centers. She is the only person who has ever won Nobel Prizes in both physics and chemistry.