string(276) "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%E5%88%B7%E9%A2%98%E8%BD%AF%E4%BB%B6%E5%93%AA%E4%B8%AA%E6%9C%80%E5%A5%BD%E7%9F%A5%E4%B9%8E => Failed to connect to 101.89.117.144 port 38017: Connection refused"
一建刷题软件哪个最好知乎
