string(301) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%81%E5%85%AD%E8%BF%9B%E5%88%B6%E8%BD%AC%E5%8C%96%E4%BA%8C%E8%BF%9B%E5%88%B6%E8%AE%A1%E7%AE%97%E5%99%A8%E6%80%8E%E4%B9%88%E7%94%A8 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
十六进制转化二进制计算器怎么用
