string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=df-41%E6%B4%B2%E9%99%85%E5%BC%B9%E9%81%93%E5%AF%BC%E5%BC%B9%E6%80%A7%E8%83%BD => Failed to connect to 14.18.117.71 port 38069: Connection refused"
df-41洲际弹道导弹性能
