string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%9D%A2%E8%AF%95%E5%B8%B8%E9%97%AE%E7%9A%8430%E4%B8%AA%E9%97%AE%E9%A2%98%E5%8F%8A%E5%9B%9E%E7%AD%94 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
面试常问的30个问题及回答
