问题
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Certain programs work better for some _____ for
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Certain programs work better for some _____ for
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Scientists have known for some time that certain plants, called hyperaccumu-lators, can co
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Many people feel that human beings should be responsible for the disappearance of some ot
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Only those who worked here for more than five yea
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Text 2For more than two decades U.S. courts have been limiting affirmative-action program