string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E5%AE%B9%E7%9A%84%E8%80%90%E5%8E%8B%E5%80%BC%E6%80%8E%E4%B9%88%E7%9C%8B => Failed to connect to 101.89.117.144 port 38005: Connection refused"
电容的耐压值怎么看
