The grand mediocrity of today--everyone being the same in survival and number of offspring--means that natural selection has lost 80% of its power in upper-middle-class India compared to the tribe.答案【参考答案】当今人与人在很大程度上的平等——即面对自然淘汰法则人人机会均等...
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Topographic Factor (LS) is the slope length-gradient factor that represents the effect of topography on soil erosion rates and it is defined as the estimated ratio of soil loss per unit area from a field slope to soil loss from a 22.13 m length of uniform 9% slope (Wischmeier and Smith1...
While cultivated land increased in total 12,983 ha, with an average increment by 381.85 ha per year, forest land lost in total in total of 48,149.6 ha equivalent to annual decrease of 1416.16 ha/year, grassland lost in total in total of 9120.5 ha equivalent to annual decrease of 268.25 ...