string(289) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E6%B1%9F%E8%8B%8F%E4%BA%8C%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%88%E6%9C%BA%E7%94%B5%E5%AE%9E%E5%8A%A1%E7%AD%94%E6%A1%88 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
2020江苏二级建造师机电实务答案
