Many scientists find that colors can change people's feelings. It's very interesting. Some colors can make people feel relaxed (放松的), and some colors can make people feel nervous (紧张的). Now, this kind of knowledge is being used in many places. For example, school walls are always painted green because green makes students feel relaxed. It is also good for the students' eyes. Some books are also green or light blue for the same reason. Restaurant owners not only have to know how to make food, but also have to know how to make money. Here are some things they've learned from scientific studies. The color red makes people hungry. Many fast food restaurants have red furniture or walls. Soft colors like pink and light blue make people feel relaxed, so they spend more time eating. Loud music may be nice at first, but it soon makes people want to leave. Hard seats also make customers want to eat quickly and leave. Many restaurants, especially fast food restaurants, use this knowledge to make customers eat faster.
The crow is an ordinary bird. It is about twenty inches (英寸) long and black all over. Crows are dirty birds because they live on bad food. Crows eat a lot of waste food. In this way, they are more useful to us than other birds. They clean up the dirty things in our streets. Crows are always hungry. They look for food all day long, and in the evening you can see them in large numbers flying back to their nest in the trees. They sleep there at night.
Crows are much noisier than other birds. Very often a large number of crows will get together on one house and talk. Sometimes they talk together. And sometimes they do it by turns like human beings (人类).
It is easy to tell from (区别) crow's sounds whether they are pleased or angry. Perhaps crows talk a lot because they are friendly birds. A pair of crows will live together all their lives, and if one of them dies, the other one becomes very sad and quiet for the rest of its life and sometimes it dies, too.
Crows |
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length |
color |
food |
work |
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look for food |
home |
sounds |
life |
useful |
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pleased, angry, friendly |
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clean up the dirty things |
share heart different mirror loud |