????:1?????:????t?????

2?????

3?????

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

5?????????

2?8?11????50????,???????????????2????

???8?????????24??????,????10?????????1?????????????,???29???,?????2?,????????????1??????????????????????????????????????1????,?,???????????????????,?????????????????

2?8???????????16?????????,?17??????????????

?????,?60??????????????????????????,????????????80???7???

2???????????????8??,??200??????????????,?????

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

2?9??????,?,??????????????,?,??1.2??????10??20??,????????????????100????????,??10????(?? ? ????????????????? ?? ???????? ???)

?:????