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  3. Why is the South Pole cold than the North Pole? 【M1】______ Both polar regions of the earth are cold, pri

Why is the South Pole cold than the North Pole? 【M1】______ Both polar regions of the earth are cold, pri

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问题     Why is the South Pole cold than the North Pole?                         【M1】______
Both polar regions of the earth are cold, primarily
because they receive far less solar radiation than the
tropics and mid-latitudes do. In either pole the sun                        【M2】______
never rises more than 23.5 degrees above the horizon
and both locations experience six months of continuous
dark. Moreover, most of the sunlight that does shine                        【M3】______
on the polar regions reflected by the bright white surface.                 【M4】 ______
What make the South Pole so much colder than the North Pole                 【M5】 ______
is that it sits on top of a very thick ice sheet, which itself sits
on a continent. Surface of the ice sheet at the South Pole                  【M6】______
is more than 9000 feet in elevation--more than a mile
and a half over sea level. Antarctica is the highest continent              【M7】______
on the earth. In comparison, the North Pole rests in the middle
of the Arctic Ocean, which the surface of floating ice rides                【M8】______
only a foot or so above the surrounding sea. The Arctic Ocean
also acts an effective heat reservoir, warming the cold atmosphere          【M9】______
in the winter and is drawing heat from the atmosphere in the summer.        【M10】______
【M2】
选项
答案in改成at考介词。
解析 这句看似没有什么问题，其实是in用错了。我们说在小地方用at，大地方用in南极北极都是个小点，所以用at。其实可以看看上下文，在第6句中有at the South Pole。
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