9.Inert to means to reduce the oxygen in an oil tank by inert gas to avoid an ______atmosphere.
(A)flammable
(B)toxic
(C)expensive
(D)explosive

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統計： A(36), B(21), C(31), D(110), E(0) #625447

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#4826706
explosive 爆炸性
(共 15 字，隱藏中）
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