?????????3.1????:???,????????
???2?7???????????? ?7?,???2?35?3.1???????????37.14??????,?127.76???,?9??????????
?,?(P?)???4.2?????,????????????????3.1???????????????
??,????????????????,??,??????44?????,?????,??
?????????????,????,???2????54??????,??????????23?????????????????????3???,??? ?????????????:???