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What effect does excessive positive ionization have on some people? A high negative ion count is likely to be found ______.
What effect does excessive positive ionization have on some people? A high negative ion count is likely to be found ______.
admin
2009-06-24
18
问题
What effect does excessive positive ionization have on some people?
A high negative ion count is likely to be found ______.
选项
A、near a pond with a water pump.
B、close to a slow-flowing river.
C、high in some barren mountains.
D、by a rotating water sprinkler.
答案
C
解析
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公共英语(PETS)
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