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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.
- Blank(i)
- superseded
- halted
- caused
- Blank(ii)
- disparity between
- feedback between
- complexity of
- Blank(iii)
- unpredictable
- static
- self-perpetuating
caused , feedback between , self-perpetuating 显示答案
以上解析由 考满分老师提供。