百度试题
题目
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相关知识点：
解析
原因：自然海岸线变化的人为原因从围海造陆、海岸工程建设、围垦和养殖等方面分析；
影响：人为改变海岸线会影响海岸线的自然演变；海岸工程建设大量排放废弃物污染海洋环境；使生物多样性减少；降低海岸防灾减灾的能力。
海岸线从形态上看,有的弯弯曲曲,有的却几乎似条直线。而且,这些海岸线还在不断地变化着。海岸线变化指因海平面升降和地壳运动造成海岸线后退或者前进。由于受海平面升降或地壳活动的影响,引起海水的侵入(海侵
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