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单选题
The purpose of the spoilers is to disturb the smooth airflow across the top of the airfoil thereby creating an increased amount of drag and a decreased amount of lift on that airfoil.
A
扰流板的作用是使机翼上的阻力增加，升力减少,从而扰乱流经该机翼上表面的平滑气流。
B
扰流板的作用是扰乱流经机翼上表面的平顺气流，从而使此机翼上的阻力增加，升力减少。
C
扰流板的作用是增加机翼上的阻力，造成升力减少,进一步干扰流经该机翼上表面的光滑气流。
答案解析
正确答案：B
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