?????

(1)?????50-6O????????????????

(2)???????????????????????????(???)????5-10????????4-5?


??:

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1. ?? ?????????????????????
2. ??? ?????
(1):?????????????10-3O??????@{??????????????????
(2)??:??????1/101/56-7kg???????????????????????20-30????????????????
(3)???????1-2??3?10-20?????????
(4)????????C????2-3kg?2??15???????1O-14?
(5)?T???????????????2???1????
()
1.?? ????????????????????????????
?????????????????????????
2. ???????:
(1)????????@?????s?}????????????????;??????????...