?? ?? ?3????????????????1?
![](http://n.sinaimg.cn/news/1_img/vcg/2b0c102b/102/w1024h678/20181225/-dDU-hqqzpkv5051662.jpg)
????:1??????:????
2???sn??
3????????????
4??????????
5??????
?,2???14????????????17??20????,???S314??,???????????????????????,??????????3???,1??
???,??(??????????????? ?? ??????????????)
???:???????,2???14????????????17??20????,???S314??,???????????????????????,??????????3???,1??
???,??(??????????????? ?? ??????????????)
???:??????????:1??????:????
2???sn??
3????????????
4??????????
5??????
?,2???14????????????17??20????,???S314??,???????????????????????,??????????3???,1??
???,??(??????????????? ?? ??????????????)
???:??????