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Unformatted text preview: a. Cosmic b. Intrinsic c. Background d. Uneventful 43. Just under half of mans exposure to external natural radiation comes from? a. Radon b. Cosmic radiation c. Rocks d. Food 44. Radon dose comes primarily from its daughter products which are ? a. Ingested b. Counted c. Inhaled d. Touched...
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- Spring '10