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

2?????600?????

3???400??

4??????????

5?????qt

??????,??“??”????????,??,???????????

???????,???«????»,???????????1000??,????????????????????????????????????,????????????100??????,?????500???????????????;??10?????????????,3???????????,????????????????

???????????????????????????,???????????????????????????6????,????????????????????,????,??,???????????,???5?????

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

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