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19???19??6?????16??5?????????????????

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??????????????????????????????????1b?13M?1?RNA????RNA?DNA??????

???1b?13?1?????????????????????????510?1b????????13?1????Ramanathan???????????????

???????????????30%40%Ramanathan?????

???1???????ɧ?????????????????????????80%

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2017??????2016??????????4????????????????????

6329???????????????????????6329????????????????

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