2. 外语
  3. The computer brings both the【B1】______and dangers. That means danger to physical and 【B2】______well-being of the people who wor

The computer brings both the【B1】______and dangers. That means danger to physical and 【B2】______well-being of the people who wor

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问题     The computer brings both the【B1】______and dangers. That means danger to physical and  【B2】______well-being of the people who work at computer【B3】______. The survey done in the UK shows that the【B4】______abnormalities of pregnant women who work with computer terminals is 20% higher than those of pregnant women who didn’t work with computer terminals.  【B5】______for long periods to the video screen causes disturbances to vision and【B6】______stress. Some trade unions【B7】______down their own guidelines to【B8】______members’ health. There are two groups of computer users, professional, and amateur.【B9】______. People working with computers have backache because they crouch over an inconveniently positioned keyboard. People working in front f the screen【B10】______.It seems that the electrostatic field of the video screen attracts dust from the atmosphere and irritates exposed skin. The first precaution is an alternative source of light from that of the screen itself.  【B11】______. These are all common-sense precautions.
【B7】
选项
答案laid
解析 过去式。Lay down此处意为：制定。
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