string(289) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2023%E4%B8%80%E9%80%A0%E8%AE%A1%E4%BB%B7%E6%95%99%E6%9D%90%E6%9C%97%E6%A0%BC%E7%B3%BB%E6%95%B0%E6%B3%95%E4%BE%8B%E9%A2%98 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
2023一造计价教材朗格系数法例题
