A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can
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A.greater range
B.effective on all types of fires
C.cleanliness
D.All of the above
A.lack of toxicity
B.the multipurpose extinguishing ability
C.bum-back protection
D.cooling ability
A.can be used in conjunction with wire or spring-lay rope
B.can be stored on decks exposed to sunlight
C.can hold a load even when a considerable amount of the yarns have been abraded
D.gives audible warning of overstress whereas manila does not
A.used to measure the speed of wind
B.in which the pressure of air is measured
C.that tells which dirction a storm is coming from
D.used to measure the height of waves
A.a boat bucket
B.an air tank filled with water
C.an oar and canvas weighted down
D.All of the above
最新試題
Bales close to the deckhead should be covered to prevent（）.
Which of the following is not a form of precipitation?（）
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
The circulation around a low pressure center in the Northern Hemisphere is（）.
Where would you find information about the time of high tide at a specific location on a particular day of the year?（）
Fog is likely to occur when there is little difference between the dew point and the（）.
According to the relevant regulation, lifeboat should be powered by（）.
A tide is called diurnal when（）.
What is it called when it is possible to ignite the vapour above the oil?（）
When the wave period and the apparent rolling period are the same（）.