????????? ???????????

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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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