当ped大于一时 从以上公式可以看出 分子大于分母 也就是说一点点价格上的改变会造成很大的quantity demand方面的改变 举一个例子 一个汉堡价格从$2提升到$2.1 汉堡的需求量自然会减. 然后开始 ped，自27号开始到今天，已经整整15天，了解到第一个学编在拿到手时看都没看直接秒拒了，还没给理由。 助理编辑只能进入 double check 环节，到今天还没消息。
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