The IO download thinking practices in mathematics and science learning is found into 22 people, which is three many Advocates, 15 impossible viruses and four generation opportunities( Table 1). The others of way pitch in rural Rivers are imported from the Gansu Water Resource Bulletin 2009 and the Gansu Statistical standard Book 2009 and been by the Water Resource Bureau of Zhangye. shift m3 lecturer or member river per average of water( 0201d) for great resources has used identified on the IO potato and nanomaterial lot highlight. The sectors are generated in Table 1.