问题
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Now scientists have found in the past few years ______.A.the exposure of DNA to the public
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CAN ANIMALS BE MADE TO WORK FOR US? Can animals be made to work for us? Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings. The
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What conclusion can be drawn from the scientists observation?A.Insects have developed some
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Scientists have known for some time that certain plants, called hyperaccumu-lators, can co
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Some social scientists have claimed that divorce harms children for the rest of their li
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The author thinks good scientists are those who have all the following EXCEPTA.some genera