单项选择题
A.High water line B.Low water line C.Low water spring line D.Tide level
The broken magenta lines（long and short dashes）in and a...
单项选择题The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.
A.Amphibious training areas B.Grounds for dredge spoil C.Fish trap areas D.Gunnery exercise areas
The arrangement of charts in the catalogue is（）.A.on a ...
单项选择题The arrangement of charts in the catalogue is（）.
A.on a regional basis B.on a national basis C.shown orderly D.appeared from A to W
That the scale of any part of a chart to be larger than...
单项选择题That the scale of any part of a chart to be larger than the scale of the survey is（）.
A.very rare B.common C.often D.reasonable
