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單項(xiàng)選擇題

As you approach mile 659.4 AHP，you see on the right descending bank a flashing green light. This light marks（）.

A.a lock that is open
B.a sunken barge
C.a dolphin，water intake and discharge
D.the end of a wharf

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單項(xiàng)選擇題

As you approach mile 427.6 AHP，you see on the right side a white buoy with orange bands and diamond. This buoy marks（）.

A.a cable crossing
B.a sunken barge
C.a submerged discharge pipe
D.the end of a wharf

單項(xiàng)選擇題

As you approach Giles Bend Cutoff Light (mile 367.7 LDB)，what type of daymark would you see on the light structure?（）

A.Green diamond
B.Green triangle
C.Red diamond
D.Red square