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單項(xiàng)選擇題

A disadvantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it is （）.

A.heavy
B.easily damaged
C.affected by temperature
D.costly relative to the strength ratio

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單項(xiàng)選擇題

A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame（）.

A.stopper
B.screen
C.filter
D.restrictor

單項(xiàng)選擇題

A decrease in barometric pressure is associated with all of the following except（）.

A.rising warm air
B.proximity to a low pressure area
C.inward spiraling circulation
D.clear dry weather

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