string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E5%B9%B4%E4%B8%80%E9%80%A0%E6%95%99%E6%9D%90%E5%87%BA%E4%BA%86%E5%90%97 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
2021年一造教材出了吗
