题目内容

The gradient direction of the function f(x) at a certain point is () of the function at that point.

A. direction of steepest rise
B. rising direction
C. direction of steepest descent
D. descending direction

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Which option is not a fundamental property of perception?()

A. integrity
B. retentivity
C. comprehension
D. permanence

When people move from a darker environment to a brighter one, the adaptation process of the human eye is called ().

A. Perception of brightness
B. Sense of brightness
C. Adaptation of brightness
D. Adaptation of darkness

When designing a desk, which dimension is its drawer bottom surface apart from ground height should be referenced?()

A. Sitting height
B. Leg bending height
C. The thickness of the thigh

The maintenance operation is dangerous.() 2:Visual field refers to the space range that can be seen by the eyes when looking at objects under the condition that the head is fixed and motionless.(×) 3:The larger a person's critical perspective, the better their vision.(×) 4:Noise is spectacularly useless at best, and positively harmful at worst.(×) 5:Human is the measure of all things.() 6:Anthropometric subjects are divided into three categories: individuals, some groups, and all.(×) 7:Noise is the sound of sound intensity above 75 decibels.(×) 8:Noise interference varies from person to person, even wonderful music can also be called noise.()

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