问题
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Why does the professor mention Spain?A.Because Spain helped America to get Louisiana Terri
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Why does the professor mention the Moons mantle?A.To explain how scientists are able to es
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Why does the professor mention the Western-Heritage Model used in her high school?A.To exp
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Why does the student mention Professor Connellys class?A.She was not happy with the grade
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Why does the professor mention the wood thrush?A.To contrast its displacement activities w
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Why does the professor mention the "free-rider" problem?A.To review a concept he explained