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  3. What does the article tell us about? What are forces acting upon an airplane?

What does the article tell us about? What are forces acting upon an airplane?

admin2010-02-05  45
问题 What does the article tell us about?
What are forces acting upon an airplane?
选项
答案Lift, weight, thrust, and drag。
解析 根据句子“Lift is one of the four primary forces acting upon an airplane. The others are weight, thrust, and drag.”来做。
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