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單項選擇題

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

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單項選擇題

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

單項選擇題

As the temperature of the air reaches the dew point，（）.

A.rain must develop
B.fog may form
C.it begins to snow
D.water freezes

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