string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E7%90%86%E5%90%88%E5%90%8C%E5%BF%85%E9%A1%BB%E4%B9%A6%E9%9D%A2%E5%90%97%E6%80%8E%E4%B9%88%E5%86%99 => Failed to connect to 101.89.159.206 port 38187: Connection refused"
监理合同必须书面吗怎么写
