题目内容

Price elasticity of demand along a linear, downward-sloping demand curve increases as price falls.

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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.

对于收敛的正项级数，其通项必定单调趋于零。

1、扰流板打开时，飞机机翼上的升力减小，阻力增加