Help
End Section Review
End Exam
Answer Edit Confirmation
课程
活动
资料
反馈
题目内容
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.
学员19owhi
学员17olsf
学员12vvra
学员16vowq