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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According to TRIZ's classification of innovation, "Asymmetric design of 737 engine cover" belongs to ()
A. Level 1: obvious solution
B. Level 4: new concept
C. Level 3: radical improvement
D. Level 2: minor improvements
According to TRIZ's classification of innovation, "The plane,PC" belongs to ()
A. Level 5: invention
B. Level 2: minor improvements
C. Level 3: radical improvement
D. Level 4: new concept
The infantile life curve of the system is characterized by()
A. Value and potential emerge, a large number of people, material and financial input, efficiency and performance are improved, more investment is attracted, the system is developing rapidly
B. Low efficiency, poor reliability, lack of human and material input, slow development of the system
C. The system is becoming more and more perfect, the performance level is the best, the profit is the biggest and has a downward trend, the research results are relatively low
D. Technology reaches the limit, it is difficult to have a new breakthrough, will be replaced by a new technical system
The decline life curve of the system is characterized by()
A. Low efficiency, poor reliability, lack of human and material input, slow development of the system
B. Value and potential emerge, a large number of people, material and financial input, efficiency and performance are improved, more investment is attracted, the system is developing rapidly
C. The system is becoming more and more perfect, the performance level is the best, the profit is the biggest and has a downward trend, the research results are relatively low
D. Technology reaches the limit, it is difficult to have a new breakthrough, will be replaced by a new technical system
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