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???????2??,???????????,??????????????????????,2??????????????????

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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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