短路和断路的电路图片网!
string(256) "get document error:https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9F%AD%E8%B7%AF%E5%92%8C%E6%96%AD%E8%B7%AF%E7%9A%84%E7%94%B5%E8%B7%AF%E5%9B%BE%E7%89%87 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
短路和断路的电路图片网!