GRE Text Completion: JiJing 1373-GRE填空机经1373题 - 2076IXRHF_ICW5JTA

There are two opposing theories about mountain formation and climate over the past 40 million years: either the surge of mountain building (i)____________ the global cooling or vice versa. The first of these two theories asserts that widespread mountain building cooled the Earth as a result of the (ii)____________ mountains and climate. For example, mountain glaciers tend to be (iii)____________: once established, they increase the reflectivity of the surface, thus lowering temperatures and allowing more ice to form. A. superseded B. disparity between C. unpredictable D. halted E. feedback between F. static G. caused H. complexity of I. self-perpetuating