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%95%99%E6%9D%90%E5%95%A5%E6%97%B6%E5%80%99%E5%87%BA => Failed to connect to 101.89.117.144 port 38022: Connection refused"
2021一建教材啥时候出
