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

????:???????:????200??????

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

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

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

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

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

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