New fighter jets are being designed so that th
问题详情
New fighter jets are being designed so that the wing is modifiable, depending on the speed at which the plane is going. Which
of the following would be a logical adjustment of the wing for such jets？
A.At speeds above 500 mph, the top of the wing would become flatter.
B.At speeds above 500 mph, the top of the wing would become more curved.
C.At speeds above 500 mph, the bottom of the wing would become curved.
D.None of the above请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
Since the question deals with speed, it’s a good bet that experiment 3 (Table 3) is the one that’s most relevant. In Table 3, notice that wing design 2 is more efficient than design 1 at lower speeds, but once a speed of 500 mph is reached, design 1 outperforms design 2. Thus,it appears that at high speeds a “flatter” wing design is more beneficial.
