单项选择题
The broken magenta line which runs parallel to the shorebetween Roanoke Point and Mattituck Inlet marks a（）.
A.fish trap area B.pipeline C.demarcation line D.cable area
单项选择题 The best estimate of the wind direction at sea level can be obtained from observing the direction of the（）.
单项选择题 Steam smoke will occur when（）.
单项选择题 RYUKYU S TO SE 6 BEC 4－5.ISOL SHWRS.SEA 3 M BEC 2 M.SWELL SE 3－4M.This description is likely to be under the heading of（）.
