(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 gave outstanding contributions to science and society that. were recognized still in her lifetime. In particular, the discovery of radium com-. pletely changed the therapeutic methods for treatment of cancer and other dis-. eases, and allowed the development of radiotherapy and nuclear medicine.