单项选择题

The Daily Memorandum contains information on（）.

A.active weather disturbances such as hurricanes or tropical storms
B.the latest navigational warnings
C.scheduled vessel arrivals and departures for a 24-hour period
D.water levels at river ports where run-off affects tidal heights

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The charts show two dashed lines crossing the river justsouth of St. Catherine Bar Light. What does this indicate? （）

A.Overhead power lines
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单项选择题

The broken magenta line which runs parallel to the shorebetween Roanoke Point and Mattituck Inlet marks a（）.

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