string(246) "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%E5%81%9A%E8%BF%91%E5%87%A0%E5%B9%B4%E7%9A%84%E7%9C%9F%E9%A2%98 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
一建做近几年的真题
