????:1?????????:????vx

2?????

3?????92?95?

4??????????

5???????????

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

??????????????,????????????,?42.3?????,???15.3%,????????????????????????50%,??????????????????????111??????????????????,??????,????????????,??7.3?????????????????

?? ?????????????????:?????11??,???????????6400????,??????????????35%,???????,????????1/3,?????

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

(??)

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