string(264) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B1%9F%E8%8B%8F%E7%9C%81%E4%BA%8C%E5%BB%BA%E6%9C%BA%E7%94%B5%E5%AE%9E%E5%8A%A1%E7%AD%94%E6%A1%88 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
江苏省二建机电实务答案
