string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%BA%E7%94%B5%E4%BA%8C%E5%BB%BA%E8%80%83%E8%AF%95%E5%86%85%E5%AE%B9 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
机电二建考试内容
