string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E6%9C%BA%E7%94%B5%E6%A1%88%E4%BE%8B%E7%AD%94%E9%A2%98%E6%A8%A1%E6%9D%BF => Failed to connect to 101.89.166.210 port 38089: Connection refused"
二建机电案例答题模板
