高考英语最值得背诵的英语文章精粹高考英语最值得背诵的英语文章精粹1Cellsa
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i
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tthatthisclassificatio
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2SleepSleetispartofaperso
’sdailyactivitycycleThereareseveraldiffere
tstagesofsleepa
dtheytoooccuri
cyclesIfyouarea
averagesleeperyoursleepcycleisasfollowsWhe
youfistdriftoffi
toslumberyoureyeswillrollaboutabityoutemperaturewilldropslightlyyourmuscleswillrelaxa
dyourbreathi
gwellslowa
dbecomequiteregularYourbrai
wavesslowa
dbecomequiteregularYourbrai
wavesslowdow
abittoowiththealpharhythmofratherfastwaves1sleepForthe
exthalfhourorsoasyourelaxmorea
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waveswillbeThe
about40to69mi
utesafteryouloseco
scious
essyouwillhavereachedthedeepestsleepofallYourbrai
willshowthelargeslowwavesthatarek
ow
asthedeltarhythmThisisstage4sleep
fYoudo
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atthisdeepfourthstageall
ightlo
gbuti
steadabout80mi
utesafteryoufalli
toslumberyourbrai
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