单项选择题 Providing you are not sailing in the Red Sea or another special area as listed in ANNEX V of MARPOL，how many miles from land must you be to throw garbage including bottles，rags，and glass that has not been ground up into the sea? （）

单项选择题 Open ullage holes in tanks which are not gas-free must be protected by（）.

单项选择题 Oil slick caused by spillage of oil from tanker ship is（）.