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【单选题】
最大无作用剂量是A.
未能观察到任何对机体损害作用的最低剂量
B.
未能观察到任何对机体损害作用的最高剂量
C.
人类终身摄入该化合物未引起任何损害作用的剂量
D.
一种化合物在环境中存在而不引起生物体的损害的剂量
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