Câu hỏi 9. Why is it important to take breaks when working at a computer?
Câu 49: 1. Write down whether the following statements are true or false. a. Engineers write software that directs the hardware to perform a particular task. b. Data entry operators run large computer systems. c. Direct users interact and are in control of a computer system. d. A monitor should allow for minor adjustments of angle, brightness and contrast to cater for individual differences. e. A systems analyst installs and repairs the hardware of a computer system. f. Computer technicians are indirect users of computer systems. g. Computer operators oversee the computer operation.
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h. Keyboards produce more noise than a typical typewriter. i. A chair should allow a clearance of 200 mm between it and the desk. J. Computer consultants are people who assist users of a computer system by answering their questions on hardware or software, usually over the phone. k. Keyboards should require only a minimum of pressure to reduce strain on the fingers. 2. What is ergonomics? 3. List and describe three jobs involved in the design and construction of a computer system. 4. What is the recommended height for a chair? 5. Explain the meaning of the term 'user'. 6. List and describe seven jobs involved in the operation and maintenance of a computer system. 7. What is the recommended temperature for the work environment? 8. Why is air-conditioning usually required in a room containing computer equipment? 9. What ergonomic considerations need to be taken into account when designing a job for a computer user?
Câu 50: Although a computer can be a very useful tool it is not the solution to all our problems. There are certain problems which computers do well and other problems which people do well. Computers are very good at processing data quickly and accurately, storing and retrieving large quantities of data, and following instructions. People are better at recognising patterns, setting goals, identifying issues, solving problems, and dealing with special cases. A computer solution involves using a computer system to solve a problem. It is needed when a task is too difficult, dangerous or time-consuming for people. For example, the task of sorting names could take hours for a person, but can be done in seconds by a
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