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

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

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

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

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

?:

1?????;

2??????????;

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

4???

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