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【单选题】

Besides the electrons, an atom also contains positive electrical particles______total charge must be equal to that of the electrons.
A．which

B．that
C．whose
D．of which
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根据网考网移动考试中心的统计，该试题：

8%的考友选择了A选项

10%的考友选择了B选项

80%的考友选择了C选项

2%的考友选择了D选项

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