????2????????????

?1?????????????????26????? (???? ????)1?????????????????26?,???2?????????,???????????????????2?????????????????????????????

??,2?????,???????????????????0.1~0.5?,?:?21.0~23.4?,?????19.0~21.9?,?????????????????????

?,??(1????28???????????~2?????????4?),??????????????????????????????,????,?2?3???~4???,????????????????????????????1????????30?~2?1??,?????????1????????31?~2??????????????1???????????????????????????????????,??????????????2?????1?????????

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