2. 外语
  3. According to the passage, economies is ______. Modern societies control supply and demand ______.

According to the passage, economies is ______. Modern societies control supply and demand ______.

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问题 According to the passage, economies is ______.
Modern societies control supply and demand ______.
选项 A、by direct intervention in the pricing of goods and services
B、by means of money and the price mechanism
C、by keeping a watchful eye on relative price changes
D、by fixing prices in specific industries
答案B
解析 细节题。答案是第三段第一句：Money and the price mechanism...are the means by which all modern societies regulate demand and supply，即现代社会调节供需的方式是货币和价格机制。
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