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

2??????????

3??????????????

4???????????

5??????????

????12????19????????????????? ???????,??,??,???????????????????10?,?????????12~15?????;????????,??????0????????????????,?????

????,?????????,??????????????????????????????????????????????,?????????????????????????????????????????????????????????3~4???????????????????0????????,???,??,???

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??????19-21????,???????,??,??????????????????????4~6?,????2~4?,????,????????6~8?,??10???????????????????????????????????4~5?????????????,??6~8???????????????

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