单项选择题

Why does the author mention a dog's bark

A．It is a type of memory.
B．It is a type of interruption.
C．Dogs have better memories than humans.
D．A dog's bark is similar to a doorbell.

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单项选择题

The author believes that rote rehearsal is ______.

A．the best way to remember something
B．more efficient than chunking
C．ineffective in the long run
D．an unnecessary interruption

单项选择题

The underlined word elapses in paragraph 1 is closest in meaning to ______.

A．passes
B．adds up
C．appears
D．continues

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