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(一)所选择的区域:1.人群活动最少的地区;2.所在地无任何污染源;3.海岸线是规则的(没有防波堤,也不是曲折的);4.沙滩上;5.为了进行适当的取样,海滨上应有一定的坡度,但不能倾斜到涨潮和退潮时二水线之间的距离过大。
(A) Selected areas: 1. Areas where the population is least active; 2. There is no source of pollution at the site; 3. The coastline is regular (no breakwater nor tortuous); 4. On the beach; 5. In order to make the appropriate Sampling, the beach should have a certain gradient, but can not be tilted to the tide and the ebb tide between the two water lines is too large.