string(265) "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%E6%9C%BA%E7%94%B5%E5%90%8E%E5%86%8D%E5%A2%9E%E9%A1%B9%E5%93%AA%E4%B8%80%E7%A7%91 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
一建机电后再增项哪一科
