Changes in Micro-structure and Micro-area Elements of Post-transplantation Plantlets from Dendrobium huoshanense Micro-Structure Examination of Strengthened Wood Sheets by Compression Perpendicular to Grain Retention Capability of PM2.5 and It’s Explanation by Leaf Surface Micro-structure of Common Broad-leaved Plant Species in Beijing Study on the Morphological Changes of the Ectomycorrhizae Formed by Tuber aestivum on Cyclobalanopsis glauca Seedlings Observation of Floral Organogenesis and Development of Tagets erecta L. Observation of Floral Organogenesis and Development of Tagets erecta L.