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【单选题】
目前，世界人口受到的人工辐射源的照射中，居于首位的是( )。A.
大气层核试验
B.
医疗照射
C.
核电站
D.
核能生产
E.
放射源的应用
拍照语音搜题，微信中搜索"皮皮学"使用
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A.
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B.
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