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string(221) "get document error:https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%AE%89%E5%AE%89%E5%85%A8%E6%8A%80%E6%9C%AF%E9%A2%98%E5%BA%93 => Received HTTP code 403 from proxy after CONNECT"
注安安全技术题库网!