??2???????8?????????????? (?????????????????? ??????????????)?????????????????,??????????????????????500???????????????????,??,????????????

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

???,?,“???????????????????,?????????????????????????????????????”?(??????) ???:??? “????????”_????

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

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

2????????vx

3???9581??????

4????????????

5?????

??2???????8?????????????? (?????????????????? ??????????????)?????????????????,??????????????????????500???????????????????,??,????????????

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

???,?,“???????????????????,?????????????????????????????????????”?(??????) ???:???