Radon gas is a carcinogen which the EPA and others consider to be, next to cigar

游客2025-01-20 28

问题 Radon gas is a carcinogen which the EPA and others consider to be, next to cigarette smoking, the most widespread cause of lung cancer.

选项 A、medicine
B、test
C、cancer-causing agent
D、painkiller

答案 C

解析

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