题目内容

n order to enable operators to move freely at work and avoid adverse psychological barriers and physical injuries, the minimum floor area of the workshop shall not be less than () m squared.

A. 80
B. 8
C. 0.8
D. 20

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Given that F(X)=-2x12+2x1x2-x22+2x1, it is determined that its stagnation point (1,1) is ().

A. the smallest pointt
B. Minimum point
C. Maximum point
D. the biggest point

Standing posture usually refers to the position a person maintains when the Angle of forward bend of the upper body is less than () degrees.

A. 5
B. 45
C. 30
D. 15

Human-computer interface mainly refers to ().

A. Control and operation system
B. control system
C. Display system
Display and control system

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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