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

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

3?????QT??

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

5?????

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

????????????????,??????,??????60%?????????,??????,???????????

??????,?????????1800?????????????????6??????????6?,????6???????????

?????,???????????,?????????,?????800?????????????????

????????????????????????????????????,????????????????????,??????????????,?????21??????????

6?????????????15??????????????,???????,?????????????????,????????????????????,???????????????????,??????????74????85%????????????????????

??(6??????????????????16??????????)???????,??417?,?13????????,?????,???????? ????????:???