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

2??????????

3?????????????

4???????200??

5?????????

???7???23????? ??????????23????????,6????,?????9.44??????,????8.89?????5??,6??10%,??9.7%?

?????,????,6?????(1.84??????????????????????)??(1.64??)??????????????????????(0.89??????)????(0.85?????)?

??????,????,???????66.2??(???????1.02?????);?,????61.2?????(?????????????????0.94????);????,?????56.3????(???0.87?)?(???????) ???????????????:?????