string(263) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cpa%E5%90%AC%E8%AF%BE%E7%AE%80%E5%8D%95%2C%E4%B8%80%E5%81%9A%E9%A2%98%E5%B0%B1%E5%BA%9F%E4%BA%86 => Failed to connect to 101.91.112.32 port 38195: Connection refused"
cpa听课简单,一做题就废了
