Is the curie the unit in which exposure to a dose of radiation is measured?

No, the curie (Ci) is a unit that measures radioactivity, specifically the amount of radioactive decay occurring in a sample, rather than the exposure to radiation. Exposure to a dose of radiation is typically measured in gray (Gy) or rad, which quantify the energy deposited in a material by ionizing radiation. The curie is related to the activity of radioactive materials, while gray and rad are concerned with the biological effects of absorbed radiation.