问题
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What does the author concern most in the passage?A.Education on genetically-modified food
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Why is the debate on genetically modified foods more heated in developing countries?A.Beca
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What does "balk" mean in the third paragraph?A.acceptB.refuse to complyC.suspectD.challeng
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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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Why did Kenya refuse some people to enter the country?A.Because they set bank accounts in
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Why does the author mention an elderly mouse in p