string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%BA%E7%94%B5%E5%AE%9E%E5%8A%A1%E8%B0%81%E8%AE%B2%E5%BE%97%E5%A5%BD%E5%95%8A => Failed to connect to 101.91.112.32 port 38195: Connection refused"
机电实务谁讲得好啊
