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2???????

3????????

4??????

5?????600?????

??????11???????27???? ?????,??????,????????,????????????????????????????????????????????4~8??,???????????????????????10~20??????????0????????????????????

??,??,?????????????????????????????????????????????,???????(30~49.4??)????????5??11?????,??????????10~20??????,?????????????????????????????30~48?????

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???????,?????????24????????????,??????????????????????????????????????????????????????????????????????????????????4~5?????????6~8??;???????????????????7~8??????????????9~10??????,?????????????????7~8???????????????????9?????

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