?1?????25??? ???,25???,?5.7???????????????

???????????????????????????????????????,?19???49?5.7???????????,??21???6.4??,????????7.7???,?43.9?????????????????????????????4????

??????????????????“?”,????

??????1?????,??????????4.8?,???6.8??????,???????????????4?????????

?,??????6???1??????????,?5.1?????;????????????20??21???,??5?,??????????3.3?????????4.5??

??,25?19?49??5.1?????(??) ????:??????

??

??:???????????,??????????,??????????????