string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AD%A6%E9%9C%B8%E7%AC%94%E8%AE%B0%E5%93%AA%E4%B8%AA%E7%A7%91%E7%9B%AE%E5%A5%BD%E7%94%A8%E4%BA%9B => Failed to connect to 101.89.159.206 port 38100: Connection refused"
学霸笔记哪个科目好用些
