单项选择题

Electrical impulses affect ______.

A.long-term memory
B.short-term memory
C.structural changes
D.brain cells
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单项选择题
The experiments of two groups of rats indicate that ______.
A.temperature affects rats' memory
B.the relationship between temperature and memory is very clear
C.there is distinction between short-term memory and long-term memory
D.rats can relearn the task after forgetting it
单项选择题
What is the main idea of this passage
A.The difference between short-term memory and long-term memory.
B.The experiments of two groups of rats.
C.The temperature for rats to lose their memory.
D.The importance of memory.
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