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

2?????150???????

3?????????vx

4??????????

5?????????100?200?

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

??????????,??8??,??????????

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

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

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

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

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

?,?????????9?????????????,????????????????????????,????????????

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