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EFFECT OF MIXED PLANTING 0F fRAXINUS MANDSHURICA WITH ALNUS JAPONICA AND LARIX OLGENSIS Relationship between species distribution and habitat effective temperature in subalpine meadow of Mt.Xiaowutai A STUDY OF DIRECT RADIOIODINATION METHOD FOR LABELLING ANTITUMOR DRUG-METHOTREXATE ( MTX ) Prokaryotic Expression, Purification and Activity Analysis of Recombinant Carboxypeptidase G2 Clinical observation of Jiedu Tongluo Lishi decoction on treating reactive rheumatoid arthritis