??????--?????????1976????2????28
?????????????12g??????18g??????30g??
??????????????3????
?????????Ρ???θ?????????????
???÷??????????1-2?裬???3?Ρ??????????????壬??????????θ??????????????磬??????????????
???????á?????????????????У?23????????????????3??????з???????????????????Σ???X??θ???????????????????????????????????????????????????????????51???????X??θ???????飬???????????????棨???裩?????????????????????????????????????????δ??????
???????????????1976????2????28