string(252) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%B8%80%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%88%E6%9C%BA%E7%94%B5%E5%8F%82%E8%80%83%E7%AD%94%E6%A1%88 => Received HTTP code 403 from proxy after CONNECT"
2021一级建造师机电参考答案
