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题型:阅读理解-单选 难度:0.4 引用次数:263 题号:8606763

Do you know why different animals or pests(昆虫)have their special colours?Colours in them seem to be used mainly to protect themselves.

Some birds like eating locusts(蝗虫),but birds cannot easily catch them.

Why?It is because locusts change their colours together with the change of the colours of crops. When crops are green,locusts look green. But as autumn comes,locusts change to the same brown colour as crops have. Some other pests with different colours from plants are easily found and eaten by others. So they have to hide themselves in the day and appear only at night.

If you study the animal life,you'll find the main use of colours is protecting themselves. Bears,lions and other animals move quietly through forests. They cannot be easily seen by hunters. This is because they have the colours much like the trees.

Did you ever notice even strange act?A kind of fish in the sea can send out a kind of very black liquid(液体)when it faces danger. While the liquid comes out,other sea animals cannot find it. So it can easily swim away. It's not strong at all. But in this way it has lived up to now.

1. From the passage we learn that locusts.
A.can change their colours only in autumnB.are easily found by birds
C.are dangerous to the birdsD.can change their colours to protect themselves
2. How can pests with different colours from plants keep out of danger?
A.They have the colours much like their enemies.B.They run away quickly.
C.They hide themselves in the day and appear only at night.D.They have to move quietly.
3. Bears and lions can keep safe because they.
A.have the colours much like the things around themB.move quietly
C.like brown and grey coloursD.live in forests
4. The kind of fish live up to now because.
A.it is very big and strongB.the liquid it sends out can kill other fish
C.the liquid it sends out helps it run awayD.it swims faster than any other fish
5. Which is the best tile for this passage?
A.The Change of Colours for Animals and PestsB.Colours of Different Animals and pests
C.The Main Use of Colours for Animals and PestsD.Some Animals and Pests
19-20九年级上·全国·单元测试 查看更多[2]

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【推荐1】People already know a lot about animals. However, there are still some things about animals that may surprise you. Here are some facts about animals you probably didn’t know.

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【推荐2】In our city there is a big zoo. There are a lot of different animals in it. There are some scary tigers and lions. They like eating meat and they eat much meat every day. There are also two big elephants and a baby one. Children like to ride one of them. The elephants are very kind and friendly. They eat much grass and bananas. In the zoo, we can see different kinds of bears, brown bears, black bears and sun bears (马来熊). They are all slow and clumsy (笨拙的). They stand on their back legs and lift (抬起) their front legs to ask for food. They like cakes very much. Do you like pandas? There’s only one in the zoo. Her name is Lingling. She is very cute. She likes eating bamboo a lot. She is kind of shy. She’s very interesting and lovely.
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When you close your eyes and need to rest, sleep is just the very best. Sleep helps your body grow and stay healthy. However, in the animal world, it seems that some animals don’t need much sleep.

Giraffes usually sleep, although not for a long time. In places like zoos giraffes have been known to sleep for between four and five hours, mostly at night. During sleep, the animal may lie down or stay standing. Standing sleep is more common among older giraffes. In the wild, however, the animals almost never sleep for longer than five minutes at a time. More often, they sleep fully standing and their eyes are half-open so they can see an enemy getting close.

Deer(鹿) do not sleep much during the day or the night. In fact, the night is a dangerous time for the animal to sleep because some of their enemies look for food at night. However, deer try their best to sleep for three to four hours. Even when sleeping, they have to be careful so that they do not become food for their enemies.

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1. Which of the following facts are true about giraffes?
A.In the wild, they may lie down to sleep.B.In the zoo, they sleep with their eyes half-open to see an enemy.
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A.It sleeps during the day.B.It can stay awake for 200 days.
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A.Babies don't sleep at all.B.Mothers sleep less than fathers.
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