阅读理解 Going to sleep may seem pretty boring compared with all the fun things there are to do while you're awake．But there's a lot going on in your mind and body while you're tucked under those covers 题目和参考答案——青夏教育精英家教网—

阅读理解

　　Going to sleep may seem pretty boring compared with all the fun things there are to do while you're awake．But there's a lot going on in your mind and body while you're tucked under those covers．

　　Sleep, in fact, is as important to your survival as eating and drinking．Sleep improves your mood, makes you a better athlete, and helps you remember and understand what you learned during the day．During sleep your temperature drops．Your heart rate slows．Down goes the pressure of the blood moving through your veins．A chemical that controls growth(called a hormone)surges into your bloodstream．Scientists think sleep restores energy and improves your immune(免疫)system．We know what happens while we're asleep because scientists study volunteers who sleep in laboratories．The sleepers are hooked up to machines that measure brain waves, eye movements and muscle activities．

　　Sleep is like a school day：it's divided into different periods, or stages．When you're awake, your brain waves fire rapidly．As you begin to relax and drift into the first stage of sleep, your brain produces slower-moving waves and you lose awareness of your surroundings．As you slide to deeper sleep, your body repairs itself from the normal wear and tear of daily life．Then, as you begin to drift back up to a lighter sleep, your mind becomes more alert(机警), and your dreams begin．You're in REM sleep．

　　REM was names far the“rapid eye movement' that happens while you're dreaming．During REM sleep, your eyes move back and forth behind your timed lids, as though you were washing a movie．During other stages, you might move at that in bed, but during REM sleep you're still．That's probably because if you could move, your body would act out your dreams．As you get closer to morning, you spend more time in REM than in deep sleep, so you dream more．Researchers know that during REM sleep the part of the brain that handles learning and thinking is very active．

　　Getting too little sleep can affect your personality．Experts recommend that children get at least nine hours d sleep a night．So sleep fight．

(1)

What does the word“recommend”in the last paragraph mean?
[　　]
A．	Suggest．
B．	Ask．
C．	Wish．
D．	Order

(2)

Sleep has many advantages except ________．
[　　]
A．	improving your mood
B．	making you strong
C．	helping you study
D．	practicing your eyes

(3)

During your sleep, ________． ①your body repairs itself from the normal wear and tear of daily life ②your brain produces slower-moving waves ③your dream begins ④you loose awareness of surroundings Choose the right order：
[　　]
A．	①③②④
B．	②④①③
C．	④①③②
D．	④③①②

(4)

Suppose this is the course of your sleep, in which part of the course do you have dreams?
[　　]
A．	light sleep
B．	deep sleep
C．	light sleep
D．	the whole course

(5)

Which of the following is NOT right?
[　　]
A．	Hormone has something to do with your growth．
B．	You cannot move while you are in REM sleep, dreaming．
C．	The closer to morning, the more dreams you have．
D．	You may move around in your bed during your sleep．

答案：1．A;2．D;3．B;4．C;5．D;

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where the jungle did not actually spread down into the river, banks of soft mud prevented us going ashore.
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creatures and the jungle was so thick that one would be able to advance only slowly, cutting one's way with
knives the whole way. So we stayed in the boat, hoping that when we reached the sea, a friendly fisherman
would pick us up and take us to civilization. 　　
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