题目内容
Remember last year's summer vacation? When you think back on it, you might see flashes of a day you
spent swimming or a night watching stars. But how do you store these images (图像), so you can enjoy
them later? By using your memory.
When something happens, your brain (脑) decides if the information is important. If it is, your brain
saves it and puts it in your memory. You have a short-term memory and a long-term memory. You also
have a memory for images and for sounds.
What scientists agree about is that people remember things in different ways. Some remember things
better with the help of pictures. Others remember better when they take in the information by hearing it.
But if you can use both when you study, you will have an advantage. So why not try pictures with English
words, and at the same time listen to recordings of the same words? Maybe studying English will no
longer be such a headache.
Scientists say that imagination (想象) and association (联想) help us remember. Imagination means
picturing a word in your mind. Association means relating (联系) words to things you know.
1. When something happens or you meet someone, your brain first _____.
A. saves it and puts it in your memory
B. stores these images for you to enjoy later
C. decides if the information is important
D. turns the information into flashes
2. We know from this article that scientists agree that _____.
A. people have a short-term memory and a long-term memory
B. people have images for memory and sound
C. people remember things in the same ways
D. imagination and association may help people remember
3. The writer suggests that you should look at pictures with English words while _____.
A. listening to recordings of the same ones
B. reading the same words aloud
C. writing the same words quickly
D. using your imagination widely
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Do you know why you sleep? You may think it's because you're tired. Or perhaps you've been told sleep
is good for you. Yet no one knows exactly why or how people sleep.
Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist
watched people sleep. He noticed that during periods of between 5 and 30 minutes, sleepers' eyes made
rapid movements, as if they were watching something. He called these periods REM (Rapid Eye Movement)
sleep. He called periods when sleeper's eyes did not move non-REM sleep.
Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements
showed that sleepers' pulses (脉搏) went up quickly during REM sleep. Their breathing, heartbeat, and the
blood going to the brain also increased. Far from being a time of rest, sleep is a time when the body is hard
at work. Scientists still don't know the reason for this. Some believe REM sleep makes learning easier.
Babies spend a lot of time on REM sleep. Because of this, some scientists believe that REM sleep helps
the brain grow. Others think REM sleep is a time for the brain to empty the day's garbage.
One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make
mistakes. Most car accidents happen during the early morning hours, when people are sleepiest.
B. sleep
C. increase
D. stay the same
B. large
C. empty
D. clear anti lively
B. Paragraph 2
C. Paragraph 3
D. Paragraph 4
B. about the scientific research of REM sleep
C. about how to empty the day's garbage
D. that our body is good at work when sleeping
B. young people can experience REM sleep
C. the speed of sleepers' pulses will slow down during the REM sleep
D. all scientists have the same opinion on REM sleep