2. 外语
  3. (science) ______ have done countless experiments to show that praise is far more effective than criticism in improving human beh

(science) ______ have done countless experiments to show that praise is far more effective than criticism in improving human beh

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问题 (science) ______ have done countless experiments to show that praise is far more effective than criticism in improving human behavior.
选项
答案Scientists
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