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

2???????

3?51?????????

4???24????

5?????vx

????????2?14? (???? ??????????????)?14???????????????????????,?????????????????????,???????????,?????

??????????32?????????????????????27????????????????????????26?????????????????????????????????????????,????100?????????????1000??????1500???????????????,?(?????????????????)????4×7.5???????5??????(?????????)7??????“??”?????????????????????????,???????,???

32?,????13???,????19?????????????????,???????????????????????,?????????????????????????????????,????,?????????????????????????“??????????”???????

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

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