string(270) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cpa%E7%BB%BC%E5%90%88%E5%8E%86%E5%B9%B4%E7%9C%9F%E9%A2%98%E9%87%8D%E5%A4%8D%E7%8E%87%E9%AB%98%E5%90%97 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
cpa综合历年真题重复率高吗
