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

2?????????

3??????????

4?????????

5????????

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

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

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

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

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

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

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

??:????????