A.transmit the thrust of the engine to the propeller
B.transmit the thrust of the propeller to the vessel
C.absorb the shock of wave pressure at the bow
D.be placed between the engines and the foundation to absorb the vibration
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A.altostratus
B.stratus
C.cumulus
D.cirrus
A.The moment of inertia would remain unchanged
B.The moment of inertia would be 1/4 its original value
C.The moment of inertia would be 1/2 the original value
D.None of the above
A.equally sharing the load
B.jammed together
C.as far apart as possible
D.rove to the highest mechanical advantage
A.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current
A.at a high rate of speed
B.under oars
C.against the wind
D.with the wind
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A tsunami is caused by a(n)（）.
A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a（）.
A tow that is properly aligned to pass through a narrow opening between two bridge piers is “ （）”.
A tackle is “two blocked” when the blocks are（）.
A twin-screw vessel with a single rudder is making headway. The engines are full speed ahead. There is no wind or current. Which statement is FALSE? （）
A towing hook may be released from the（）.
A tug is “in irons” when held in a fixed position by（）
A time diagram is a diagram of the celestial sphere as observed from above the（）.
A stand-on vessel is（）.
A thin，whitish，high cloud popularly known as “mares’ tails” is（）.