????:1??????????:???????????

2?????

3???????

4????????

5???????

?????????????1?20??? (?? ??)??????????????????????????20??,23???????????,??????????,???????“??????????”?,???????16?,??

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

19??,??????,????????????20??20?????????????,???????????20??????21????????????????????,???????,?,??????20?????????????20°C,???????10°C?????15°C???????????,??,??

??????????,23??????????????,??????????23?,??????,24??27???????????,????????8???12????,??14??????????????16?,??4???????6?????,?????

?????????,??,?????????????,??,??????,????????????,?,??????????????,?,????????(?????????) ????:??