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

2???????

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

4?????????

5???????

???(????):???(10????????????12?????????????)??????,????,??????????????????????????????5??

?????????23???,??30%????????????,??????????????????????????????????10?,???????“???”?

????,????????7?????????,?1200?,????????27????????????42??70????80???,???40??2?????10??????7?????????????42?????????????

????,????????????????????????????????????,???70%???,???13????????????????? ??:?????????????????