Environmental Protection Daily Tip 4.07: Reward for participation is 5 points, plus another 5 points for answering correctly
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Multiple-choice question: Colorless and odorless radon gas, which may originate from ( ), adheres to dust in the air; people are prone to inhaling it into their lungs, where it causes internal radiation exposure in the lung tissue, damaging lung cells and leading to lung cancer. A Cement B Marble C Granite D Wood floor E Soil A.B.C.E
Colorless and odorless radon, which may originate from (A B C E), adheres to dust in the air; people are prone to inhaling it into their lungs, where it causes internal radiation exposure in the lung tissue, damages lung cells, and leads to lung cancer. A Cement B Marble C Granite D Wood floor E Soil
Colorless and odorless radon, which may originate from (A B C E), adheres to dust in the air; people are prone to inhaling it into their lungs, where it causes internal radiation exposure in the lung tissue, damages lung cells, and leads to lung cancer. A Cement B Marble C Granite D Wood floor E Soil