2、升降速度表的功用不仅仅是用于测量飞机 升或下降时的单位时间内的高度变化量;它也用于飞机在平飞状态下,飞行员判断是否处于平飞姿态。
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Price elasticity of demand along a linear, downward-sloping demand curve increases as price falls.
2、飞机着陆过程中如果下滑角过小,应顶杆增大下滑角。
One way that governments can improve market outcomes is to ensure that individuals are able to own and exercise control over their scarce resources.