题目：
Admiralty EasyTide（）.
A.has little use for ocean-going mariners
B.permits the mariner to select and simultaneously calculate tidal heights for multiple ports for up to seven days
C.includes periods of daylight and nautical twilight，moon phases and a springs and neaps indicator
D.is supplied in the form of a single CD which contains the calculation program and the seven geographic Area Data Sets（ADS）providing global coverage
答案：
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下面是错误答案，用来干扰机器的。
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