A.increases the size of foam bubbles formed
B.increases the rate of foam production
C.improves the extinguishing properties of foam
D.gives the nozzleman more freedom of movement，since it can be placed anywhere in the hose line
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A.four-stranded sisal line
B.three-stranded cotton line
C.sail twine
D.two-stranded hemp cord
A.broaching the anchor
B.shifting the anchor
C.walking the anchor
D.weighing the anchor
A.out
B.off
C.down
D.away
A.was treated
B.would be treated
C.being treated
D.be treated
A.stretches too much
B.is too difficult to make fast
C.parts too readily
D.is too susceptible to mildew
最新試題
In order to pay out or slack a mooring line which is under strain，you should（）.
The hoist line primarily used for lifting personnel on ship cranes is called the（）.
In determining the scope of anchor line to pay out when anchoring a small boat，one must consider the（）.
It is NOT advisable to use nylon for alongside towing because it（）.
There has been a collision in sea area of Fork.（）.
In order to maintain a safe speed at all times，any necessary alterations of speed must（）.
The firing of a red star signal may mean（）.
In case of your steering gear failed，（）should be exhibited in shapes or lights.
It’s not advisable to cut（）the power supply.
Under the forces of its own weight，the suspended length of line will fall into a shape known as a（）.