?:??????9??????????????10?

????:??????????:?????????

????2??3????????????? ??????,??,2??3?????20??4????20??,?????????????????????5~6?????????????7~8????,??????,?????????????????6~8???????9~10???????????????????????????????????????????????????????7~8????????????????9?,??????9????????10???

2??????4?????????????20????5??20????,???????????????????????????????5~6????7~8?,???????????????6~8???9~10??????;??????????????????????????????????????????7~8?????????????????????????9????,???????????????????9?????????????????10??????

?

?:

1???????????????????????????????????,?;

2????????????,??????????;

3?????????????????????????????,?????????????????;

4???????,?????

???????:??