string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E6%A1%88%E4%BE%8B%E8%80%83%E8%AF%95%E6%8A%80%E5%B7%A7 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
一建案例考试技巧
