作业帮首字母填空.求学霸相助.首字母填空 Sleep is very important.Doctors and scientists began s________ sleep about thirty years ago.They have learned a lot by studying s________ people,but there is still m________ to learn.Scientists have lea
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首字母填空.求学霸相助.首字母填空 Sleep is very important.Doctors and scientists began s________ sleep about thirty years ago.They have learned a lot by studying s________ people,but there is still m________ to learn.Scientists have lea
首字母填空.求学霸相助.
首字母填空
Sleep is very important.Doctors and scientists began s________ sleep about thirty years ago.They have learned a lot by studying s________ people,but there is still m________ to learn.
Scientists have learned that there are two k________ of sleep ---sleep with rapid eye movement(REM快速眼动) and sleep with no rapid eye movement(NREM无快速眼动).
NREM sleep has three stages.Stage One starts w_________ you go to sleep.You have a pleasant floating(漂流) feeling.You sleep lightly a_________ may be woken up by sudden noises .In Stage Two,you sleep more deeply .Even l_________ noises may not w__________ you up.You reach Stage Three within about thirty minutes.Your brain waves(脑电波) become smaller and l________ .You reach REM sleep within a_________ thirty minutes.Dreams happen in this kind of sleep.During sleep,REM and NREM come in turn.
....最后第二个应该是longer 还是less......第二个是sleeping还是some.......
首字母填空.求学霸相助.首字母填空 Sleep is very important.Doctors and scientists began s________ sleep about thirty years ago.They have learned a lot by studying s________ people,but there is still m________ to learn.Scientists have lea
studying
sleeping
much
kinds
when
and
loud
wake
longer
about
第二个改成sleeping吧.比我的some好、
studying, some, much, kinds, when, and, loud, wake, less, about