题型：阅读选择 题类：常考题 难易度：普通
江苏省无锡市锡北片2017届九年级下学期期中考试英语试卷
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Do you and your friends ever talk about your dreams with each other? If you do, you might have noticed something interesting – some of your friends seldom remember their dreams, but some can always describe their dreams so clearly that it seems like they're describing things that really happened to them. What makes those people different?
The answer is simple. There are two different types of dreamers – low dream recallers（回忆者）and high dream recallers.
Low dream recallers usually remember their dreams only twice a month. But high dream recallers are able to remember them about five mornings a week. And a new study suggests that activity in a certain part of the brain could have something to do with it, reported The Huffington Post.
Perrine Ruby, a French researcher at the Lyon Neuroscience Research Center, studied 41 people (21 high dream recallers and 20 low dream recallers) and recorded their brain activity.
She found that a part of the brain called the temporo-parietal junction (颞顶联合区) was more active in high dream recallers than in low dream recallers – both when they were sleeping and awake.
This brain area collects and processes（编程）information from the outside world. This means that high dream recallers know more about what's happening around them. For example, when they are awake, they respond (对……有反应) more strongly to hearing their own names, and when they are sleeping, they are woken more easily by sounds and movements.
By closely studying people's brain activities, Ruby found that high dream recallers have twice as much “wakefulness time” during sleep as low dream recallers do. And it is during these short times of wakefulness that the brain remembers dreams.
“The sleeping brain is not able to remember new information,” Ruby told The Washington Post. “It needs to wake up to be able to do that.”
This is not hard to understand. Just try to think of your own sleeping experiences. If you are worried during the night, you are more likely to remember your dreams, but if you sleep well, you will remember little in the morning, and this is because “you never get a chance to remember”, Robert Stickgold, a Harvard Medical School researcher, told The Washington Post.
Some animals live in very hot places, for example, snakes and camels (骆驼) live in deserts (沙漠). Other animals live in very cold places, like the Antarctic (南极). Polar Bears (北极熊) ●Polar bears live in the ice and snow. Their bodies can help them stay warm. ●Their fur is the same colour as the snow to hide (隐藏) themselves. ●They smell things well and know where to catch seals (海豹). Penguins (企鹅) ●Penguins are birds but they can't fly. They can swim fast in the water for a long time. ●They have lots of fat to stop them getting too cold. ●Father penguins look after the egg for months and mother penguins hunt for food. ●Penguins are found in both hot and cold places. Some kinds of penguin love hot weather! |
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