问题
最新题目
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从抽样的过程讲,食品样品可分为A.抽检样品B.实验室样品C......
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He grasped both of my hands and begged me to help him out.A.understoodB.had a hold overC...
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I often do absent-minded things,particularly when.....
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在收集食物样品时最核心的问题就是要最大化地减少抽样误差。A.....
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It was obvious that he was not going home.A.possibleB.evidentC.necessaryD.probable..
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They should not sacrifice environmental protections to foster economic growth.A.giveB.rea..
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