string(268) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ocp%E8%80%83%E8%AF%95%E9%A2%98%E7%9B%AE%E7%AD%94%E6%A1%88%E6%98%AF%E5%9B%BA%E5%AE%9A%E7%9A%84%E4%B9%88 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
ocp考试题目答案是固定的么
