?? ????????
????:1??????????:??????
2??????150
3?????????
4???????
5???50??????
?
????,??,????,1970?????????4????,??,???
??
???,??,??,1972???12?,????,??????????
????????
??,???,????,1977?5????,?,???
????????
?,????,?,1980?????8?,?,???
???:????