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单选题

A． It enabled the researchers to track participants' memories.
B． It provided exciting images of famous people and places.
C． It stimulated volunteers' memories of a given moment.
D． It caused subjects to forget their memories for a while.

参考答案A

解析:What was the function of the method the researchers developed?
【解题思路】四项均以it开头，且均为一般过去时的描述性句子。本题考查的内容应该是关于主语it的相关情况，听录音时应首先听清it的指代对象，进而将重点放四项的关键信息上(track participants ’memories，provided exciting images，stimulated volunteers’memories，caused subjects to forget their memories)。
【解析】讲座中先提到了研究中遇到的挑战，接着提到，研究者设计了一种方法，让他们能真正追踪个人的大脑记忆。由此可知，该方法使研究人员能够追踪实验参与者的记忆，故A项为正确答案。其他三项均与讲座内容不符。

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单选题

A． Because they could bring a special feeling to the participants.
B． Because they could produce a desirable experimental result.
C． Because they could stimulate participants' bold imagination.
D． Because they could evoke sweet memories in people's mind.

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单选题

A． Words trigger a memory better than images and pictures.
B． Forgetting caused by remembering occurs in an instant.
C． Brain activity is suppressed when pictures are shown.
D． The researchers can watch how the brain suppress memories.

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单选题

A． It makes more children under five suffer from diseases related with malnutrition.
B． It makes about two billion people die from diarrhea each year.
C． It leads to poor quality of life and environmental health problems.
D． It slows the economic growth of the whole world.

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