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题目内容
（英语（专升本））
18.Workers working with computers are protected against ________.
A)the disturbance of natural light to their vision
B)watching television for long hours
C)increased stress and disturbances to vision for being exposed for long periods to the video screen
D)playing computer games during work hours
A)the disturbance of natural light to their vision
B)watching television for long hours
C)increased stress and disturbances to vision for being exposed for long periods to the video screen
D)playing computer games during work hours
参考答案