????2?6???? ??????????,??????????????(2?5????????),???????????????????????????????????????????????????????????????????????????????7~9?,??????????????????????10~13??????????????????????,??????????????????????

6???????8??,??,??????

????????????,?????????6~8?,???????????????????10???;??4~6?,???7~8?,??10??????8?????,??????0??????,????????8~10?,????12????????

?,?????????????,?????4~6?????7~8??????????,????????,?????????????????????9~10????;??????7~8???????????????????9~11??????6??????????

6?7?????????????,??,??????????????????????????,6??????7??????????,????????????,??;?????????????

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

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