Cryopreservation of Cell Line L-2/M delta 2-3 from Embryo of Drosophila melanogaster:The Effects of Cell Density on the Cytoactive Approach to Mechanism of Preserving Fresh for Cut Flowers Resource and protection of the national key preserved wild plants in Zhangheyuan Nature Preserve Quantitative assessment of hriority for conservation of the national protected plants in Xingdoushan Nature Preserve Quantitative Assessment of Priority for Conservation of the National Protected Plants in Qizimeishan Mountain Nature Preserve Assessment of Protection Efficiency to the Changbai Mountain Nature Reserve Analysis of flora and resources plants on compositae in Qizimeishan National Nature Preserve A Study on the Volatile Flavor Constituents of Sichuan Preserved Vegetable (Brassica juncea Czern et Coss.) The Effects of Preservation Methods and Storage Time on Estimating the Nuclear DNA Content (2C-value) of Bamboos