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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