?????????????????????????????????????????
1.???
??????900????700????900????1.4?????1.2????5???
?????????2?????????????20??
????????????????????????????????
2.?????
?????????????150??????????????100????50????500?????400????1.5?????15???
??????????????????4?-5??????????
?????????????????????????????????????????
3. ???
??????3????30????500??
?????????????????????????????7????
??????????????????????????????????????????????????????????????????????????????????????????????????????????????????3????9??
4?????
??????????????????????10????????
?????????????????????????????????
??????????????????????
??????2????15??????
5.???
???????????????60????????30????750? ?
???????????????????????????????????21?????15???1?2??
???????????????????????????????
