????????????2?????????18?????????? ???????18??“??”?????,?????????,??????????????,???2??????????,???1900??;?????????????2.5????????????;????????????1.2???????? ​​​

????:??? “????????”????

?? ???:???2.5????????????????

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

2???????

3????????

4?????????

5???????

????????????2?????????18?????????? ???????18??“??”?????,?????????,??????????????,???2??????????,???1900??;?????????????2.5????????????;????????????1.2???????? ​​​

????:???