?? ???????????????????
????:1????????:???????????????
2??????150??
3?????
4??????????
5?????vx
?10????????14?????????????????????(?????? ?????????????????)???14?,????????????????,???
?????????????????????????,????,??14.1??,?????“??”??1.46???????????????????????????,???????????
??????????????,?????????????????????,??1000?????????????“??”????????????????????????????????????????,??????????????????????1100?????“????????”???????,?????????????
??????????????????????,?????,?????????????27??(????????????,?),????120??,?????,???????4?????
?,???????????,????????“?????????????????????”?????????????????????,???,???????????;???,??“?????????????”??,???
??,????????????????????????????????????????????????????????,??????????????????????????,????????????????????????“???????????”??????(?????????????????????) ???:????