问题
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According to paragraph 2, the "atmospheric engine" was slow becauseA.it had been designed
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According to paragraph 2, European intellectuals moved to southern Europe during the twelf
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According to paragraph 2, Clements compared the process of ecological succession toA.the r
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According to paragraph 2, what makes some researchers think that certain cave paintings we
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According to paragraph 2, which of the following symptoms occurs in phosphorus-deficient p
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According to paragraph 2, which of the following led some early researchers to believe tha