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· demand、require、expect 这三个动词在表示“向某人要求什么,期望什么”时,不能接双宾语,需说 demand/require/expect sth. A shift(位移) in the entire curve occurs when something other than the price changes. Demand 用户主动强需求(用户强烈希望且要求得到反馈) requirement 用户请求(请求通常会按照一些预定的标准格式进行填写,且一般在提交请求后要求能够 … This is a change in demand. 知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品 … · (2) 简单平均法: (t+1)月预测量 = 1到t月实际需求的平均数。只有在随机噪声模式下,适合用此预测方法,因为峰值和谷值通过平均后刚好相抵 …