下列四幅图像，P为价格，Q为需求量，D为需求曲线，S为供给曲

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更新 2022-09-03
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下列四幅图像，P为价格，Q为需求量，D为需求曲线，S为供给曲线。在其它条件不变的情况下，下列观点中对图中某商品的均衡价格由点E移到E′解释正确的是

①该商品受需求不旺影响供给超过需求
②该商品受到其替代品需求量上升的冲击
③该商品受产品升级换代影响需求增加
④该商品生产受自然灾害影响供给量减少

A．①②

B．③④

C．①③

D．②④

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