本文根据区域政策在地区经济发展和地区差距变动中的作用,提出应当对我国中西部地区实施区域倾斜政策,以实现控制地区相对差距不再......

A typical summer weather event in the mid-west starts with a cool dry wind moving south near the Rocky Mountains and an ......

An earlier discussion of the summer northward heat flux at ground level at one location in northwest Iowa, based on obse......