string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E7%90%86%E6%A1%88%E4%BE%8B%E6%95%99%E6%9D%90%E9%A2%98%E7%9B%AE%E8%A6%81%E5%81%9A%E5%90%97 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
监理案例教材题目要做吗
