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  3. Essentially all polar ice forms from precipitation that falls as snow. Extremely cold air cannot hold much moisture and conseque

Essentially all polar ice forms from precipitation that falls as snow. Extremely cold air cannot hold much moisture and conseque

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问题 Essentially all polar ice forms from precipitation that falls as snow. Extremely cold air cannot hold much moisture and consequently cannot produce much snowfall. In recent years, air masses in both polar regions have been, without exception, extremely cold. The information above most strongly supports which of the following conclusions?
选项 A、If polar ice is currently growing and expanding at all, it is doing so only slowly.
B、If air temperatures in the polar regions were considerably warmer, much polar ice would melt off.
C、In the last few years, snowfall in the polar regions has been virtually continuous.
D、The thicker the polar ice is, the colder the air masses that are in contact with it.
E、For snow to turn into ice in the polar regions, the air has to be extremely cold.
答案A
解析
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