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  3. What effect does excessive positive ionization have on some people? According to the passage, static electricity can be caused

What effect does excessive positive ionization have on some people? According to the passage, static electricity can be caused

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问题 What effect does excessive positive ionization have on some people?
According to the passage, static electricity can be caused by ______.
选项 A、using home-made electric goods.
B、wearing clothes made of natural materials.
C、walking on artificial floor coverings.
D、copying TV programmes on a computer.
答案C
解析
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