string(276) "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%BB%BA%E7%AD%91%E5%AE%9E%E5%8A%A1%E6%96%B0%E6%97%A7%E6%95%99%E6%9D%90%E5%AF%B9%E6%AF%94 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
一建建筑实务新旧教材对比
