题目内容
Do you know why different animals or pests(昆虫)have their special colors? Colors 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 colors together with the change of colors of crops(庄稼). When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.
If you study the animal life, you’ll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters(猎人). This is because they have the colors much like the trees.
Have you ever noticed an even stranger 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 spreads over(散开), its enemies(敌人)cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.
1.From the passage we learn that locusts _______.
A. are small animals B. are easily found by birds
C. are dangerous to their enemies D. change their colors to protect themselves
2.How can pests with different colors from plants keep out of danger?
A. They run away quickly.
B. They have the colors much like their enemies.
C. They hide themselves by day and appear at night.
D. They have to move quietly.
3.Bears and lions can keep safe because _______.
A. they have the colors much like the trees B. they move quietly
C. they like brown and gray colors D. they live in forests
4.Why can the kind of fish live up to now?
A. Because it is very strong.
B. Because the liquid it sends out can help it escape from its enemies
C. Because the liquid it sends out can kill its enemies.
D. Because it swims faster than any other fish.
5.Which is the best title for this passage?
A. The Change of Colors for Animals and Pests B. Colors of Different Animals and Pests
C. The Main Use of Colors for Animals and Pests D. Some Animals and Pests
1.D
2.C
3.A
4.B
5.C
【解析】略
新课标阶梯阅读训练系列答案
口算心算速算应用题系列答案Long, long ago there was a very foolish thief. Do you know what he did one day? When he wanted to steal (偷) the bell on his neighbor’s door, he walked up to the door, took hold of (抓住) the bell and pulled hard. The bell made a very loud noise. The thief was afraid and went home.
Then he sat down to think, “I must do something about the noise,” he said. He thought and thought. At last he had an idea. “Ah, I’ll put some cotton in my ears. Then I won’t be able to hear the noise.” The next day he went to the door of his neighbor, and took hold of the bell. This time he pulled even harder. The bell rang loudly, but the thief did not hear anything. With another hard pull he got the bell out. Just then the neighbor came running out. “Steal my bell? I’ll teach you a lesson (教训),”the angry man shouted. And he hit the thief on the nose.
The foolish thief did not know how the neighbor found out he was stealing the bell. “Why did he come out just then?” he wondered (感到疑惑).
【小题1】The thief was trying to get .
| A．his neighbor | B．his neighbor’s doorbell |
| C．some cotton | D．a door with a bell on it |
| A．safe | B．difficult | C．dangerous | D．easy |
| A．he knew his doorbell was being stolen |
| B．he thought someone was eager (渴望的) to visit him |
| C．He realized (意识到) something strange happened |
| D．Both B and C |
| A．give him lessons | B．punish (惩罚) him for stealing |
| C．help him with the bell | D．be his teacher |
| A．The thief understood why he was hit on the nose. |
| B．The thief knew why the neighbor came out. |
| C．The thief thought the neighbor could not hear the bell. |
| D．The thief didn’t want to know why the neighbor ran out just at the time he stole the doorbell. |