问题
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Why does the professor tell the story about alligators?A.To explain the difference between
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Why does the professor discuss the presence of zinc in paint pigments?A.To explain why som
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What does the professor want the student to do next?A.Read some articles he has recommende
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What does the professor mainly discuss?A.Why some whales do not migrateB.How and why balee
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Why does the student go to see her advisor, Professor Anderson?A.She wants Professor Ander
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Why does the professor mention the wood thrush?A.To contrast its displacement activities w