string(250) "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%E5%BA%94%E5%85%B7%E5%A4%87%E5%93%AA%E4%BA%9B%E5%8A%9F%E8%83%BD => Failed to connect to 14.18.117.71 port 38164: Connection refused"
crm系统应具备哪些功能
