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

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

3???????????

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

5??????

??12???????2??? (??? ????)11????,????,??????????????????

??????????????,???11?????????????,??????????????????????????????????????,11??,???????????30????“U”??,??,???3%,???20%,???60%????????????????????11??????????,30????????????,???????1-10??????????3.91??????????

????????2????,11?,?????????????100???,???????????????15%,????????10?????20?????11.7%,????????????????26.3%?

??????????????????????,11???????????????,??????????18763?,???????20????????,?????1.5???“?????”,??????????????????1.5???????????,????,??11????????;????11??????????50%?

?????????????,11???????????,?????????????????,??????????????????????????????????????????,????7???????????????????,???????????????,???0.36%,???????2.40%?

???????????????????????,11??,?????300????23.4%,?????????????????????????

?,??,11?????????????3633.5????,??16.6%,??????,????9????44.3%?????,?????????????????????????????11?????

??????9????,10????“??????????????”,11????“??”????,?100?????????,?????????????????????

??????????????,??????“??,??,?????”???????????????????,?????????????????????“???”??????????????(?) ?????????:???????????????