???1???????18??(???? ?????)1???18???,????2.7????????????3.2???????????????:????????2.7???????????3.2???1?????2???4.8????????4.6?,?,??,??????????

???,?????,????

???????????????,?2.7?????????????????????????????????????;???3.2???????????????????????????????????????????????????????????????(???)???,?????????????????(?) ??????:??? “???????”????

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

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

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

3?????v?

4??????

5??????????

???1???????18??(???? ?????)1???18???,????2.7????????????3.2???????????????:????????2.7???????????3.2???1?????2???4.8????????4.6?,?,??,??????????

???,?????,????

???????????????,?2.7?????????????????????????????????????;???3.2???????????????????????????????????????????????????????????????(???)???,?????????????????(?) ??????:???