string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%89%8B%E6%9C%BA%E5%BA%94%E7%94%A8%E8%BD%AF%E4%BB%B6%E5%BC%80%E5%8F%91%E8%AF%95%E5%8D%B7 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
手机应用软件开发试卷
