???48?????2.5???????????

????:??????:????vx

?????8??29???? (???? ?????)??????????????29???,60????????????????????????,????????????48????????????2.5??????????,????2.3??????????2000??????,51????????“??????‘???’‘?’?”

????«??????????“????”?????????»???????????????????,?1963?????

???????????,???,???????????,??????????,??????????????,????,??????8???,???,????

?????????????????,???,????41???46?????????????,????????25????,?????????????????????????????????????????????????,????????????????????????????????????????????????;??????????????????,???????“?????”??????????“??”“?????????”“??”???????????????????????????“????????”??,?????????????

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