????:1??????:??????

2?????????

3?????vx

4???????

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

??????????:????????????“??????”????,?????????????????????,9?,??????,?????????????????????

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??,9?,??????????????23.3???????????????????,??18.09%,?????8??5.21%,???????????,??????????????,??????????????9???????????????????,????????????????8????13%,????????,???10????????

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??????? 9??6.17%

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?????????????,9?????????????,??,?,?????????,????????????,9???,?10.84??,?????????????6.17%,??6.47%? ???????:?????????????????