99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<ruby id="z9hxa"><xmp id="z9hxa"></xmp></ruby>

<ruby id="z9hxa"><output id="z9hxa"></output></ruby>

單項選擇題

When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）

A.Secure all engine room doors，hatches，and vents
B.Close the fuel line valve
C.Check the spread of the fire with foam
D.Cast the barge off the wharf

你可能感興趣的試題

單項選擇題

When must a dry chemical fire extinguisher be recharged?（）

A.After each use
B.When the air temperature exceeds 90°F
C.Every 6 months
D.Every 12 months

單項選擇題

When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.

A.goggles
B.ear plugs
C.soft-soled boots
D.fireman's outfit

<blockquote id="7idxc"><xmp id="7idxc">

<dl id="7idxc"></dl>