????:1??????:??100???????

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

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

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

5?????????

? ??????2????????????????????6????????????????18??????????????:

????,??????????????,2??6???20?8??????????20??????,?????6~8?,?????,????????????10??;????4~6?,??????7~8?,??????????????10????8?,????????0?????????,?????6~8??

????:

1???;

2????????????;

3????????????;

4????

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