string(250) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%B8%80%E5%BB%BA%E5%B8%82%E6%94%BF%E7%9F%A5%E8%AF%86%E7%82%B9%E6%B1%87%E6%80%BB => Failed to connect to 14.18.46.51 port 38206: Connection refused"
2021一建市政知识点汇总
