阿摩線上測驗
38. Three essential elements are involved in producing fire, namely heat,__, and fuel. To extinguish a fire, one of these elements in producing fire needs to be effectively removed.
(A) Nitrogen
(B) Argon
(C) Hydrogen
(D) Oxygen
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統計： A(1), B(2), C(4), D(10), E(0) #3479412
統計： A(1), B(2), C(4), D(10), E(0) #3479412
