????6??????????15????????????? ??,??6?15??18?????:16???,???????????????????????,????6?????????????????????????????????????16?????,??????????????????????????????????????????????????????????????35~36??,??,?????????37~39?,???40?????

17-19?????????,???????????????????????????????17????,???????????????????37~39???????,??????40?????????

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

??:

1????????????????;

2?????;

3??????????????????????????;

4????

????????????:?????? ??“????????”

?? ???????????????

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

2??????

3???????

4?????????

5????????????

????6??????????15????????????? ??,??6?15??18?????:16???,???????????????????????,????6?????????????????????????????????????16?????,??????????????????????????????????????????????????????????????35~36??,??,?????????37~39?,???40?????

17-19?????????,???????????????????????????????17????,???????????????????37~39???????,??????40?????????

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

??:

1????????????????;

2?????;

3??????????????????????????;

4????

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