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

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

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

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

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

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