2. 外语
  3. Developmental psychologists often cite yelling at children as______and a poor way to help them learn.

Developmental psychologists often cite yelling at children as______and a poor way to help them learn.

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问题 Developmental psychologists often cite yelling at children as______and a poor way to help them learn.
选项 A、benign
B、diagnostic
C、inefficacious
D、therapeutic
答案C
解析 空格处必须填一个与poor一样具有消极或否定意思的词语。inefficacious(无效的)其实就是poor的补充说明，合乎句意。benign(有益的，良性的)与句意相反：diagnostic(诊断的，判断的)；therapeutic(治疗的，疗法的)置入空格中都不合句意。故C为正确答案。
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