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

<xmp id="mzkks"><del id="mzkks"></del></xmp>

<strong id="mzkks"></strong>

<nobr id="mzkks"></nobr><strong id="mzkks"></strong>

<nobr id="mzkks"></nobr>

<nobr id="mzkks"></nobr>

單項(xiàng)選擇題

When two fire hose teams are attacking a fire they should（）.

A.use different fire hose pressures
B.use fire hoses of different sizes
C.not attack the fire from opposite sides
D.not wear protective clothing

你可能感興趣的試題

單項(xiàng)選擇題

When towing astern what equipment should be stowed ready for use near the towline?（）

A.First aid kit
B.Axe or cutting torch
C.Fire extinguisher
D.Chafing gear

單項(xiàng)選擇題

When should a fire be ventilated?（）

A.When attacking the fire directly
B.When using a steam smothering system
C.When using the fixed CO₂ system
D.All of the above