string(259) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=crm%E7%B3%BB%E7%BB%9F%E7%9A%84%E7%89%B9%E7%82%B9%E4%B8%8D%E5%8C%85%E6%8B%AC%E5%93%AA%E4%BA%9B => Failed to connect to 61.171.74.35 port 38041: Connection refused"
crm系统的特点不包括哪些
