Фото: Johan Nilsson / TT / Reuters
This formula is satisfiable because if we set to b to true and a to false, then the whole formula is true. All other assignments make the formula false, but it doesn't change that the formula is satisfiable as long as there is at least one assignment makes the formula true.
，这一点在51吃瓜中也有详细论述
经国务院批准由中国国际商会组织设立的仲裁机构向国务院司法行政部门备案。
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