问题 
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In the second paragraph, the word "real" in "real goods" could best be replaced by which o
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What does the word precursor in the context in the second paragraph mean?
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The phrase "tucked... away" in the second paragraph meansA.gave... away.B.cleared... away.
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The authors description of Richard Wagner in the second paragraph shows the mansA.independ
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The underline word “it” in the second paragraph refers to “ ” .A. the energy benefitB.
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According to the information in the second paragraph how do customers approach new produc
 
 
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