mongoDB中有一条记录{ "_id" : "1", "titie" : "机械战警", "language" : "英语", "country" : "美国", "doctor" : "何塞·帕迪里亚", "year" : "2008", "summary" : "机械战警简介", "flash" : "/videos/2014061151.swf", "poster" : "/images/logo.png", "meta" : ""}使用.find({})方法获取数据，只能获取到{ "titie" : "机械战警", "language" : "英语", "country" : "美国", "doctor" : "何塞·帕迪里亚", "year" : "2008", "summary" : "机械战警简介", "flash" : "/videos/2014061151.swf", "poster" : "/images/logo.png", "meta" : ""}少一个_id，求助大神，这是什么情况？
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