??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??

??,???,???????????????????,?????????????????,????????,?????,??????,????????????????????????????????????????,???????,??????(??????????????????????????????) ?????????????:?????????

??

??:???????????,??????????,??????????????