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

??“????”??,???,?????????“?????????”??“???”???????????“???”,???????,??????????????200???,?????30????,?????????????,???

“?”??????????“??”??????????????????(?????????????????)?(??????????1949???????,?????15????)?????,??“???????”????????????

“?????????????????????”??????????,?????????????“???????”,???????????,??,??????“???????”?????,“???????????”?????,?????????????????,??????????,??????????,???????????????????????,????,?????????????????????????,????????????

????,???????,“???????????????????”???“??”???????,?????????????5??“??”???????????????????????????,???????????“??”,??“??”???????????????,?????,??????

???????????,????????????????????????????????????????????????????????????????????????,????????,????????????????????????????????????????,?????(250~800??)???(??????????30~60??,??80?????????),??????

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???,????????????????,??????????????????,?????????????????……????????????,??“??”???,????,??????,?????,??????????????30°C?

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