?? ?6????19????????
????:1??????????:???????
2??????????
3????????
4????????
5???????
??????????6??18??????????(?????????? ????????)??18?,?????,?????????19??????????????
????,???????????,??,??,?????;????
????????????(??)? ???????? ??????????,?????300?~500??,???????????????(????????256????);????????,???????150?????~200??????,????
???,?????????7???,???????????(??)
???:??????