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

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

3???????????

4???????

5???????????

???11???????????????23?? (?? ??????????)23???,????,“???????????”???????????,??,???????????????????????????????????????????????????,??????????,????

???????????????:“?????????,????‘?????????’,???‘?’??‘??’,?????????‘???????????????’???,?,23???????????8????????????,????,????”

???,????????,????,????,?,??????“??”????????“????????”???,????7.52???????????????????????,??9.69????

???,???????????,?????????????????“????”,?“???+???”????????????,??“??????”???,????????????,?????“????”?(???????) ???:????