單項(xiàng)選擇題

Fire may ba spread by which means?（）.

A.Conduction of heat to adjacent surfaces
B.Direct radiation
C.Convection
D.All of the above

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單項(xiàng)選擇題

Fishing stake, the position of which frequently（）,exist in the area covered by this chart.

A.removed
B.altered
C.corrected
D.converted

單項(xiàng)選擇題

Fixed C0₂ systems would not be used on crew’s quarters or（）.

A.the paint locker
B.spaces open to the atmospere
C.cargo holds
D.the engine room