????:1????????????:????

2?????????????

3?????vx

4????????

5?????????

??????11?????29?(???)11???????????????29???????????,??(??“??”)????,??“? ?????”?12??5??????7?????????????????

??“5+4+X”?“5”???????(???)????????????????(???)??????5??;“4”?“???+”???“???????”???????????????????????????????4??;“X”????

??,?????????????257??????,???????????????????????????????????????????????89??,?????????????????????160??,???693??????????????????,?45?????

?????????????????? ? ??

????“???????”???????“???????????”??????“????”????????“?????”???“?????????”????“???????”,??????

???????????????????,??“??”??,??????“???????”?????,???????????????????6??,????????????5??

???????????,??,???????,??????1000???????????,??????,???????????????20????????????????(?),?????

???,??(????????????)???????????????????????????,????(???)???

??,???????«?»,????????????????????960??,?????????????????????????“??,?????????????”???

?,???“???????”???,??20??????????????,???????3???,????“?+????????”??????????

??,?????,?,??????????,??(??????????????????)

???????????:?????