string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E9%80%A0%E8%AE%A1%E9%87%8F%E9%80%89%E5%81%9A%E9%A2%98 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
一造计量选做题
