????????4???佇?????? ????????4??佇?????? ????????4?????????
????????4?????????????????????——?????
???佇??????——?????
???VS????
???????--20??48??
???????????+4
???????
??????????X4 3 ???????X1 4 =16
?????????????X2 3 ???????X3 4 =18
??Σ???????????????????????????????????????+5
6????????8X3 =24
??С??????+8
???=???85 ??????87
????????4?????e????? ??????7??19?????>> >> >> >> >>
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