單項(xiàng)選擇題

A tug is “in irons” when held in a fixed position by（）

A.the weight of its tow，its being anchored，or grounded
B.the weight of its towing hawser on the bottom
C.an adverse current
D.lack of power or an engine breakdown

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單項(xiàng)選擇題

A tug in irons is（）.

A.rudder bound
B.being tripped by the towline
C.unable to maneuver
D.broached

單項(xiàng)選擇題

A tsunami is caused by a(n)（）.

A.tidal wave
B.storm surge caused by a hurricane or tropical storm
C.earthquake on the ocean's floor
D.tornado