string(301) "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%B7%A5%E7%A8%8B%E5%B8%88%E8%A6%81%E8%80%83%E5%93%AA%E5%9B%9B%E4%B8%AA%E7%A7%91%E7%9B%AE%E5%91%A2 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
一建机电工程师要考哪四个科目呢
