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

????:????:??????

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

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

???????,??????:??????????

??????,?????????????,???????????,??????;??????????,????????????,????

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

???????????:???????