4[1]Rodgers P.Methodology in the new millennium[M].English Teaching Forum,2000. 被引量:1
5[5]Long S P,Ainswoth E A,Leakey A D B,et al.Food for thought:lower-than-expected crop yield stimulation with rising CO2 concentrations[J].Science,2006(312):1918-1921. 被引量:1
6[6]Kim H Y,Lieffering M,Kobayashi K,et al.Seasonal changes in the effects of elevated CO2 on rice at three levels of nitrogen supply:a free air CO2 enrichment (FACE) experiment[J].Global Change Biolology,2003(9):826-837. 被引量:1