string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%B8%80%E5%BB%BA%E6%9C%BA%E7%94%B5%E5%AE%9E%E7%89%A9%E7%9C%9F%E9%A2%98 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
2021一建机电实物真题
