Technology is playing an important role in helping humans work more effectively. Since
automation has become a(n) (1) _______ part of business operations, we can predict that robots
are soon going to replace many jobs that are today (2) _______ by humans. Let’s see what
merits this technology offers our world.
Increased efficiency
Industrial robots can complete certain tasks faster and (3) _______ efficiently than humans as they are designed and built to perform them with higher accuracy. This combined with the fact they are used to automate (4) _______ which previously might have taken significantly more time and resource results in the use of industrial robots to (5) _______ the efficiency of production lines. Improved quality Given their higher levels of accuracy, industrial robots can be used to (6) _______ higher quality products which (7) _______ the reduction of time required for quality control and (8)_______ that standards of quality are adhered to. Longer working hours Robots can work 24/7 and keep working at 100% efficiency. On average a 40% increase in the output of a production line occurs when one key person is (9) _______ by a robot who (10) _______ the same working hours. 1. A. integral B. certain C. impressive D. unimportant 2. A. shown B. presented C. undergone D. performed 3. A. much B. less C. more D. most 4. A. processes B. processings C. products D. producing 5. A. decrease B. reduce C. increase D. take 6. A. produce B. sell C. make D. do 7. A. result B. result from C. result in D. result to 8. A. ensure B. be ensured C. ensuring D. to ensure 9. A. replace B. replaced C. replacing D. to replace 10. A. operates B. does C. completed D. has
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Khách
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HM
1
AH
Akai Haruma
Giáo viên
30 tháng 4 2023
Lời giải:
Để $n^2+2022$ là scp thì $n^2+2022=a^2$ với $a$ là số tự nhiên.
$\Rightarrow 2022=a^2-n^2=(a-n)(a+n)$
$\Rightarrow 2022\vdots a+n$
Vì $a+n\geq 0$ với mọi $a,n\in\mathbb{N}$ nên $a+n$ là ước tự nhiên của $2022$ (1)
$a+n\geq a-n$ nên $2022=(a-n)(a+n)< (a+n)^2$
$\Rightarrow a+n> 44$ (2)
Từ $(1); (2)\Rightarrow a+n\in\left\{337; 674; 1011; 2022\right\}$
$\Rightarrow a-n\in\left\{6; 3; 2; 1\right\}$ (tương ứng)
Thử các TH trên đều thu được $n\not\in\mathbb{N}$
Do đó không có $n$ thỏa mãn đkđb