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Select the description as being for particulate ionizing radiation for a or b.
( a particles, b particles ) lose energy quickly
( a particles, b particles ) have a longer range than other particle types
( a particles, b particles ) examples include positron emission tomography scanning
( a particles, b particles ) examples include Strontium 90 used in radiation therapy for eye cancer
( a particles, b particles ) can be stopped by piece of tissue paper or dead skin
( a particles, b particles ) can be stopped by thin sheet of plastic, aluminum, or span of air
( a particles, b particles ) isn't very hazardous from external exposure