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1.海拔:海拔是指地面某個地點高出海平面的垂直距離.顧名思義,所謂海拔就是超出海水面的高度.但海面潮起潮落,大浪小浪不停,可以說沒有一刻風平浪靜的時候,而且每月每日漲潮與落潮的海面高度也是有明顯差別的.囙此,人…
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