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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

單項(xiàng)選擇題

A traffic separation zone is that part of a traffic separation scheme which（）.

A.is located between the scheme and the nearest land
B.separates traffic proceeding in one direction from traffic proceeding in the opposite direction
C.is designated as an anchorage area
D.contains all the traffic moving in the same direction