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  3. What does the article tell us about? What is the cause of "Lift"?

What does the article tell us about? What is the cause of "Lift"?

admin2010-02-05  30
问题 What does the article tell us about?
What is the cause of "Lift"?
选项
答案the upward force on the plane。
解析 根据句子“In this case, the wings pushing air downward is the action, and the air pushing the wings  upward is the reaction. This causes lift. the upward force on the plane.”得出。
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