单选题
Why does the author suggest that the experiments with the wind tunnel were important?
A、
Because they allowed the Wright brothers to decrease the weight of their airplane.
B、
Because they resulted in a three-axis control for their airplane.
C、
Because they were important in the refinement of the wings for their airplane.
D、
Because they used the data to improve the engine for their airplane.
【正确答案】
C
【答案解析】
从文章第三段可以推断，目的在于找出最佳的机翼形状。
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