题目内容
Anthropometric data is often expressed in percentiles, with the most commonly used percentiles of the 5%, ( ) % and 95%.
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People tend to understand and perceive the objects of reality according to the knowledge and experience they have acquired in the past, which is the () of human perception.
Given that binary quadratic form F(X)= 1/2xtax, and A=[1, 2; 2,4], the quadratic form is ().
From visual characteristic, the visual distance of instrument panel had better be 70CM or so, its height had better be level with eye photograph, when decorating, face plate should hind tilt () degree Angle.
The hesser matrix of F(X) with n variables is the n×n partial derivative matrix, so the matrix is ().
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