string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B4%B2%E9%99%85%E5%AF%BC%E5%BC%B9%E7%9A%84%E9%95%BF%E5%BA%A6%E5%92%8C%E9%87%8D%E9%87%8F => Failed to connect to 101.89.117.144 port 38208: Connection refused"
洲际导弹的长度和重量
