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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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