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

2????????

3??????????

4??????????

5??????????????

???????????6??????????20? (???????????)???20?,??,???????7??????????20???????????8???????,???????????

??????????,????31??,????????????????????????70%??????????????????????????????????????????????,??????????60%,????????74%?

?????6??????????????????????,????,??72%;?????????????????????,??????????77%;????,?????????48%,?????????130???????????54.5?,????????????????????58%;??,????53%????76%?

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