【简答题】A.You can learn a new culture. B.You can study according to your schedule. C.You can get human interaction of meeting people. D.You can have courses of higher standard.
【单选题】已知主港低潮时为1518,且主附港时差资料为 Time Difference High Water Low Water 0000 0600 0000 0600 and and and and 1200 1800 1200 1800 潮时差 -0030 -0050 -0020 -0015 应该主港低潮时的附港潮时差为: