#欢迎关注爱范儿官方微信公众号：爱范儿（微信号：ifanr），更多精彩内容第一时间为您奉上。
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.
。服务器推荐是该领域的重要参考
张弛从“谁规划营建了凌家滩”的追问出发，循着聚落格局、祭坛墓葬分布等多方材料，一步步揭示了5500多年前凌家滩先民惊人的城市规划意识和超大规模的社会动员能力。
隐秘大佬的矿业征途姚雄杰是谁？这个问题放在十年前，恐怕资本市场知之者甚少。即便是今天，关于这位福建龙岩富豪的早年发迹史，外界依然知道的不多。