2. 外语
  3. The first paragraph mainly tells us ______. Which of the following pictures best tells the movements of warm air and cold air?

The first paragraph mainly tells us ______. Which of the following pictures best tells the movements of warm air and cold air?

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问题 The first paragraph mainly tells us ______.
Which of the following pictures best tells the movements of warm air and cold air?
选项 A、
B、
C、
D、
答案B
解析 根据第二段的第三句可知：热空气上升，冷空气取而代之，故选B。
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