Symptoms of it include a headache that isconstantbut not severe, and a pain at the back of your head and the neck. 2015年高考英语湖北卷 听力 原文 They believe, for example, that their employees needconstantsupervision if they are to work effectively, or that decisions must be imposed from...
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scan coils and the correction magnets on the neck are _ever_ so slightly stronger than the earth's magnetic field. They can pick up a magnetic field on the frame and the shadow mask; that's why colour screens always had a degaussing coil built in to operate when they were turned on. ...
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