单项选择题

One of the features of REM sleep is that______.

A．there are large slow waves, though rapid for the first few minutes
B．you have the deepest sleep
C．there are no brain waves
D．the brain waves are a little fast and the brain becomes a little active

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热门试题

单项选择题

In the second paragraph the word dart means______.

A．glare
B．stop moving
C．move rapidly or suddenly
D．gaze

单项选择题

If you followed the advice of the writer, you would______.

A．weigh carefully what people say to determine their real meaning
B．get along well with people
C．trust what other people say
D．have no doubts about our friends