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???????2?????17??? (?? ???)?????????17??????????,?,2??13?16?,????????????????,???????????72??????????????????15.3?,?????????????;??????????????10????????48????????????????6.5?~10.9?????????,??????????;????????????????????4?????

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?????????????2??18??2????22??,?????????????????,???????????,????2??19?2???????????20?????,??????????,????????,?????????????????????????????,?,????(??)