string(328) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E6%9C%BA%E7%94%B5%E5%AE%9E%E5%8A%A1%E6%A1%88%E4%BE%8B%E9%A2%98%E4%B8%80%E8%88%AC%E8%83%BD%E6%8B%BF%E5%A4%9A%E5%B0%91%E5%88%86%E5%8F%8A%E6%A0%BC => Failed to connect to 14.18.117.71 port 38133: Connection refused"
二建机电实务案例题一般能拿多少分及格
