string(239) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%88%E6%A8%A1%E6%8B%9F%E8%AF%95%E9%A2%98 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
2级建造师模拟试题
