基金Supported by the National Basic Research Program of China under Grant No.2002CB312002(国家重点基础研究发展计划(973))the National High-Tech Research and Development Plan of China under Grant Nos.2006AA01Z159,2007AA01Z140(国家高技术研究发展计划(863))+1 种基金the National Natural Science Foundation of China under Grant Nos.60233010,60403014,60603034 6060303(国家自然科学基金)the Natural Science Foundation of Jiangsu Province of China under Grant No.BK2006712(江苏省自然科学基金)