string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E6%B3%A8%E5%8D%8F%E6%9C%BA%E8%80%83%E6%A8%A1%E6%8B%9F%E7%B3%BB%E7%BB%9F%E7%9A%84%E9%A2%98%E6%9D%A5%E6%BA%90 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
中注协机考模拟系统的题来源
