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document.write("<option>-自然景观-</option>");
document.write("<option value=\"Shanghai_zhujiajiao.html\">朱家角</option>");
document.write("<option value=\"Shanghai_dongwuyuan.html\">上海动物园</option>");
document.write("<option value=\"Shanghai_yeshengdongwuyuan.html\">野生动物园</option>");
document.write("<option value=\"Shanghai_zhiwuyuan.html\">上海植物园</option>");
document.write("<option value=\"Shanghai_qingqing.html\">青青旅游世界</option>");
document.write("<option value=\"Shanghai_gongqing.html\">共青森林公园</option>");
document.write("<option value=\"Shanghai_sheshan.html\">佘山森林白鸟苑</option>");
document.write("<option value=\"Shanghai_donghai.html\">奉贤海湾旅游区</option>");
document.write("<option value=\"Shanghai_dongping.html\">东平国家森林公园</option>");
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