???6??27? ?27??????????????,???

????,??20????20?????????????????,????????????????,????????????????,“???????”,“??”??,?????,????????

???,??????,????????,???????1900??????,???????????6??????,???“???”;????,?????19.6????????????,????,??????????“?????????????????”????????10????????????????????“????”,???

???????:?????????????? ??“????vx”

?? ????:??????“?????”

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

2????????

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

4???????

5??????

???6??27? ?27??????????????,???

????,??20????20?????????????????,????????????????,????????????????,“???????”,“??”??,?????,????????

???,??????,????????,???????1900??????,???????????6??????,???“???”;????,?????19.6????????????,????,??????????“?????????????????”????????10????????????????????“????”,???

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