题目：
石油是以液态烃为主要化学组分的可燃（）矿产。
A、无机
B、有机
C、化学
D、固体
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B解析：Monopolistic competition is another name for competitive price-searcher markets. There are a large number of independent sellers, each produces a differentiated product, each market has a low barrier to entry, and each producer faces a downward sloping demand curve.
