试题与答案

直升机的地面效应,是指直升机在接近地面的高度工作时,被旋翼排向地面的气流受到地面阻挡

题型:单项选择题

题目:

直升机的地面效应,是指直升机在接近地面的高度工作时,被旋翼排向地面的气流受到地面阻挡,从而影响旋翼空气动力的一种现象。响地面效应的因素包括()

A.温度、飞行速度和风、地表环境

B.湿度、飞行速度和风、地表环境

C.高度、飞行速度和风、地表环境

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D解析:作答本题时注意为反向选择题,选择错误的选项。中 * * 是多民族的共同体,中华文化呈现着多种民族文化的丰富色彩,中华各民族的文化,既有中华文化的共性,又有各自民族特性,它们都是中华文化...

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