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1、B-2翼梢后缘的操纵面产生偏航力矩的机理是什么？ What is the mechanism of the directinal control surface at the wing-tip trailing edge of B-2？
A．改变局部升力 change local lift
B．改变局部侧力 change local side force
C．改变局部阻力 change local drag
D．N/A
参考答案和解析
C
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