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????,?????14~15???????????,??,????????????????????,18~20???????????,????????????????,???

???????,???????,??????????????????

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??????,??????,????15~16???????

???????,??????15??,???????????15°C,?????????????5~8?,?????????????

??????????,??????????17????????????16?,??????????????,????7~8?????????

?????????????,15???????????,?????????,??????????16????????????,???????,????????15?????????,???????????????20????????????????

??,???????????4???????????????10°C??,16??????17°C;??????15????????26???????,??????????10????????,???????????

??????15????????????,??????????????????,????????????????????

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