??
???
1.?
2.??
3.?????
4.???
(?)??
?????????????????????????????k???
()??
???????????????
???????????????
()????
????????????????
1????
??(?)??918??231???????
2???
(1)??3050????25?So??3??????????????
(2)??100??12????
(3)?????o5??23
(4)?(?)?100200??3???????
3?
???
()??
??????????2-3?20-30??
()??
????20?????12?50???7??1????????????l
1.?
2.??
3.?????
4.???
(?)??
?????????????????????????????k???
()??
???????????????
???????????????
()????
????????????????
1????
??(?)??918??231???????
2???
(1)??3050????25?So??3??????????????
(2)??100??12????
(3)?????o5??23
(4)?(?)?100200??3???????
3?
???
()??
??????????2-3?20-30??
()??
????20?????12?50???7??1????????????l