??????????????? “??+????”??????

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

????????????????:????????????,10??,??????????????????????????????,????????????????????,????????,?????

10??????????????????,????????????????????????????,??0.7??????????,10?????????????????????,??9??????17.1????????????????

???????10?????????,????????????41??????????????,?????27????9????,????,??????????9????????????22.3??,??????17.8??????????????????,??4.5%,?????????????????????

??,10??,??????????????12.9%,?????????????????1.9??????????????????,?????????????????????73.3%?48.8%?

??:“??,????????????????????????????????????????????????,?,????,???????????,?????,??????????????????????”

??????????:???????????????