大电流接地系统中，电力变压器中性点接地方式有几种？
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A. way
B. hope
C. consideration
D. possible
试述毛泽东关于社会主义社会基本矛盾理论的主要内容。
When are you allowed to take a make-up test？ 查看材料
A. When you are absent on a test day.
B. When there"s a test two days after the previous one.
C. When you are really sick.
D. Within one or two days after returning to class.
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