单项选择题
When you read the sailing directions, you should notice that this is one of a series of publications produced by the（）which should be consulted by users of Admiralty Charts.
A.UK Hydrographic Office B.IMO C.International Hydrographic Organization D.International Association of Classification society
单项选择题 When are you allowed to throw plastic garbage overboard?（）
单项选择题 Which kind of fog is also named as ground fog?（）
单项选择题 Normally the mariners care more about the（）of tide.
