将产品需求的变化与相应的资源需求变化相匹配。 1: 19世纪澳大利亚淘金热期间,对黄金的需求日益增长。 ____ 2: 近期,诸如“戒糖”之类的广告宣传活动和节目引发的公众关注,导致人们对垃圾食品和碳酸软饮料的需求下降。 ____ 3: 假设学生对莫纳什大学预科课程的需求增加。 ____ 4: 近几十年来,中国经济发展迅速,对新建建筑物和桥梁的需求量很大。 ____Matching

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