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

2???sn???????

3??????????

4?400??????

5????????

24??????????????????,????21????????????????,109????????????,??????????????????????????

?????21??????????????,???109???????????????????????????????????????????????93????????,???????????????????????????70%,????????,?????????????69%?

??????????? ?:??,???????,??????????????????????????,????????????????,???????

????,????????????????11????????????? ???????:????