Materials science
Number (0): Everything in this space must add up to 0. The answer is 4-0, placed horizontally; 0-0, placed horizontally; 0-2, placed vertically.
，这一点在服务器推荐中也有详细论述
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（五）对处罚决定不服，申请行政复议、提起行政诉讼的途径和期限；