题目内容
Everything we see has the color. We see green grass and red apples. How can we see colors? We see colors when light hits our eyes. Dogs and any other animals can't see colors. But bees can. They even see colors we don't see. This helps them find flowers to fly to.
We sometimes use the names of colors to say things. People may say "see red "when they are angry.
Or you may say you "feel blue". This means you are sad. We use colors to tell us things, too. Red means to stop. Green means to go.
Some people can't tell one color from another. They can see yellow and blue. But they can't tell red
from green. We say these people are color blind(色盲).
B. Sea
C. Color
D. Beautiful World
B. the function of color
C. the color of the sea
D. the color of the sky
B. how we see color
C. why apples are red
D. why grass is green
B. why people see colors
C. why people feel blue
D. people like the red and blue color
B. color blindness
C. people and colors
D. red and green colors
Everyone likes living in a clean and comfortable environment. If the envionment(环境) is bad, it will affect(影响)our bodies, and make us not feel well. Sometimes we may be terribly ill. At that time we don’t want to work, and we have to stay in bed and rest at home. So the envrionment is very important to us.
It’s germ that makes us ill. There are germs everywhere, They are very small and you can’t find them with your own eyes, but you can see them with a microscope(显微镜). They are very small and there may be hundreds of them on a very small thing, Germs can always be found in the dirty water. When we look at dirty water under the microscope, we shall see them in it. Germs can also be found in air and dust(灰尘). If you cut your finger, some of the dust from the floor may go into it, and you will have much pain in it. Sometimes the germs will go into all of your boby, and you will have pain everywhere.
To keep us healthy, we should try to our best to make our environment become cleaner and tidier. This needs us to act together.
【小题1】The writer tell us that________.
| A.we like working when we are ill |
| B.germs can’t live in the water. |
| C.we can’t feel ill if the environment is bad. |
| D.we feel well when the environment is good. |
| A.very small things that you can’t see with your eyes. |
| B.the things that don’t effect people. |
| C.the things that you can find with your eyes. |
| D.the things that are very big. |
| A.on the small thing | B.in air and dust |
| C.only in dirty water | D.everywhere |
| A.I will feel nothing. | B.I won’t mind. |
| C.I will feel tense. | D.I will feel painful. |
| A.environment doesn’t affect our life. |
| B.we don’t need to improve our environment. |
| C.germs may make us ill. |
| D.if the environment is better, germs will be more. |