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【单选题】
汽油机燃烧过程中火焰中心在( )形成A.
着火延迟期
B.
明显燃烧期
C.
补燃期
D.
后燃期
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皮皮学刷刷变学霸
举一反三
【单选题】During a fire drill on a ship，what action is required?（）
A.
Start each fire pump
B.
Launch and run a lifeboat
C.
Inventory rescue and fire equipment
D.
Inspect fire hoses
【单选题】During a fire drill on a vessel,what action is required?（）.
A.
Start each fire pump
B.
Launch aand run a lifeboat
C.
Inventory rescue and fire equipment
D.
Inspect fire hoses
【简答题】Task 2 Listen and judge.
【单选题】At least twenty firemen were killed ______ of the collapse of the building during the fire accident.
A.
as a rule
B.
as for
C.
as a result
D.
as far
【简答题】初中时是怎么描述电磁感应现象的
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