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【单选题】
环境电离辐射按照电离辐射的照射方式可分 为内照射与外照射、局部照射与全身照射,下列说法不正确的是:()A.
内照射的效应以射程短、电离强的 α 、 β 射线作用为主。
B.
外照射的射线照射身体某一部位，引起局部细胞的反应称局部照射。局部照射时身体各部位的辐射敏感性依次为腹部＞胸部＞头部＞四肢。
C.
当全身均匀地或非均匀地受到照射而产生全身效应时称全身照射。
D.
辐射源由体外照射人体称外照射，包括 γ 射线、中子、 X 射线等穿透力强的射线，外照射的生物学效应较弱。
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