????:1???sn??:?????150????

2???????

3?????cs

4???????

5?????????100?200?

???(???????????):??,????,??,???,?????????????

?????????????????????????,????,??????????AC332?????????,??????????????????????????,????????????????????????AG600???

????????????????,???????C919????????????????,??,C919????50?????

????????????,???????????????????,??????????????,????????????????????

????,?????????,??????????????????????,?????????????,????????????,?????????????,??????????????,??,????????,???????????????????????,???????????????????????????(???) ???????????:???????????