The passage is mainly about ______. [br] The first two sentences in the second p

游客2024-02-13  14

问题 The passage is mainly about ______. [br] The first two sentences in the second paragraph tell us that ______.

选项 A、producers can satisfy the consumers by mechanized production
B、consumers can express their demands through producers
C、producers decide the prices of products
D、supply and demand regulate prices

答案 D

解析
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