2. 外语
  3. A、When they are hungry. B、When they are thirsty. C、When they smell food. D、When they want company. A事实细节题。短文指出，在第二个实验中研究者把老鼠的饥饿与

A、When they are hungry. B、When they are thirsty. C、When they smell food. D、When they want company. A事实细节题。短文指出，在第二个实验中研究者把老鼠的饥饿与

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问题
选项 A、When they are hungry.
B、When they are thirsty.
C、When they smell food.
D、When they want company.
答案A
解析 事实细节题。短文指出，在第二个实验中研究者把老鼠的饥饿与恐惧作对照研究，结果表明，当老鼠饿了的时候，它们会冒险进入不安全的地方寻找食物。
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大学英语四级

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