题目内容
________ trees have been planted near here, so the air is very fresh．
Two hundreds
Hundred of
Hundreds of
Hundreds
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 the 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.
【小题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 |
| 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. |
| 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 |
| A．Because it is very and 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. |
| 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 |
Do you know why different animals or insects have their special colors? Colors are used mainly to protect themselves.
Why can’t some birds easily catch locusts（蝗虫）? It is because locusts change their colors together with the change of the colors of crops. When crops are green, locusts look green. But as autumn comes, locusts change to the same brown color as crops have. Some other insects with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives in the day 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 can’t be easily seen by hunters. This is because they have the colors much like the trees.
Have you ever noticed an even more strange thing? A kind of fish in the sea can send out black liquid when it faces danger. While the liquid spreads over, its enemies can’t find it. And it quickly swims away. So it has lived up to now though it is not strong at all.
【小题1】 From the article we learn that locusts .
| A．are dangerous to their enemies | B．are easily found by birds |
| C．change their colors to protect themselves | D．are small animals |
| A．They have to move quietly. |
| B．They hide themselves in the day and appear at night. |
| C．They have the colors much like their enemies. |
| D．They run away quickly. |
| A．they live in forests | B．they like brown and grey colors |
| C．they move quietly | D．they have the colors similar to the trees |
| A．气体 | B．固体 | C．液体 | D．水蒸气 |
| A．The Main Use of Colors for Animals and Insects |
| B．Colors of Different Animals and Insects |
| C．The Change of Colors for Animals and Insects |
| D．The Change of Different Animals and Plants |
Two ______ trees have been planted along the lake since 1998.
|
A．thousands of |
B．thousand of |
C．thousands |
D．thousand |