問題詳情
497.缺氧是氧氣未滿多少濃度?
(A)16%
(B)18%
(C)19.5%
(D)20.9%
(A)16%
(B)18%
(C)19.5%
(D)20.9%
參考答案
答案：B
難度：簡單0.8
書單：沒有書單，新增
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