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

??

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

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

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

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

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

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

?????????

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

????????