??
??,??????????????,???????????,???
????2????????????,????,??????????????????????????????????????????????,2???????????
?????,?????????????,????????????,???????,??????????????,??????
?????????????????????????????,??????????14~15???????????????,????,?????????????????????????,18~20????????????,???????????,???
???,???????????,???
????????,?????
?????????,???????,??????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?????????,????????????,???????
???????????,??????????????????:????????
???????????,?????,???????????????????????,????;???????,?????????????,????????
?,????????,???,????,??????????????,?????????,????????,???
???????:????????????
??????????????? ???????????????????????