string(275) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%89%AF%E8%AF%8D%E4%BF%AE%E9%A5%B0%E7%9A%84%E6%98%AF%E4%BB%80%E4%B9%88%E5%8A%A8%E8%AF%8D%E5%BD%A2%E5%BC%8F => Failed to connect to 101.91.112.32 port 38221: Connection refused"
副词修饰的是什么动词形式
