The purpose of the passage is______. The researchers have conducted an experiment to prove that people will act in emergencies

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问题 The purpose of the passage is______.
The researchers have conducted an experiment to prove that people will act in emergencies when______.

选项 A、they are in pairs
B、they are in groups
C、they are alone
D、they are with their friends

答案C

解析 推断题。从第七段可知,当只有一个人出现在紧急状况周围时,他帮助的可能性最大,是百分之八十。
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