Electricity is the phenomenon (associated) with positively and negatively (particles charged) of matter (at rest) and in motion,

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问题 Electricity is the phenomenon (associated) with positively and negatively (particles charged) of matter (at rest) and in motion, either (individually) or in great numbers.

选项 A、associated
B、particles charged
C、at rest
D、individually

答案B

解析
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