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

<pre id="nxy1q"><legend id="nxy1q"></legend></pre>

單項選擇題

To extinguish an electrical fire, you should use （）.

A.mechanical foam
B.chemical foam
C.carbon dioxide
D.soda acid

你可能感興趣的試題

單項選擇題

If a CO₂ fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）

A.Dry chemical
B.Halon
C.Low velocity fog
D.Steam

單項選擇題

You hear the general alarm bells and ships whistle sound for over 10 secondsTraditionally, this is the signal for （）.

A.abandon ship
B.dismissal from drills
C.fire and emergency
D.lower lifeboats

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

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