????:1???????:??????

2???????????

3??????????

4????????????

5??????????

??????????2????????????,??????????????????

????????????2?????????1?,??????????????,???????????1.1????????????????????,??????????????,???????,????

?????????????????,???????????????????2??????????1??2????????????????????

2?1??????,?,???

2???,?????,???,???????

2???????10????5??,??????,????????????????

 

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

?2??????????????15??????????,?-4.8?????????,2????????????,2????

??????:???