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

??

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

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

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

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

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

?????:???

?????????

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

????????