9. If ____ and fire attack are coordinated, venting over the fire provides the most efficient flow of hot smoke, fire gases and air.
(A) vice
(B) vacancy
(C) vicinity
(D) ventilation

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統計： A(26), B(86), C(56), D(142), E(0) #3228953

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9. If ____ and fire attack are coordinated, venting over the fire provides the most efficient flow of hot smoke, fire gases and air. 

 (A) vice缺點、副的 
(B) vacancy 空白
(C) vicinity鄰近地區 
(D) ventilation通風設備


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