n.层
Since 1855 the longitudinal main-channel profiles in the LYR are concave-shape curves, and concavity values of these profiles increased slightly with the recent channel degradation. 河床在冲刷过程中，主槽纵比降变化不大，其纵剖面形态自1855年以来均为下凹曲线，其凹度值随河床冲刷而略有增大；
Set ds = main.Map1.Datasets.Add(miDataSetLayer, lyr 增加后，就可以查询了。
-ArcGIS engine secondary development of small procedures, functions: add shp, lyr layer, delete layer, move layers, change the legend symbol, attribute query, Hawkeye, C #. 详细说明： ArcGIS engine二次开发的小程序，功能：添加shp、lyr图层，删除图层，移动图层，更改图例符号，属性查询，鹰眼，C%23。
RR Lyr variable 天琴RR型星
Királyrévi 基拉伊雷维
