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
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相关考题
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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 -
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 -
单项选择题
Particular care is needed when navigating in the vicinity of（）as very few of these features have been fully surveyed to modern standards to determine their correct position，full extent，or the least depth over them.
A.SW of Cocos Islands
B.oceanic dangers or seamounts
C.undiscovered dangers
D.the continental shelf
