摘要: Look! He some Chinese problems. A. is working on B. is working C. works on D. work on

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Look closely at your hands. Are they clean? It doesn't matter how many times you wash your hands, tiny microbes (微生物) still stay on them. But don't worry. Most microbes don't harm you.

Now scientists say the microbes on our hands could be used in a surprising way; fighting crime, According to a recent survey microbes as well as fingerprints(指纹) could be used to indentify the criminal.

Everyone has his own set of microbes on the hands. That is to say, if you and your best friend were able to see and compare all the microbes on your hands, your hands probably would look different. Some microbes only show up on your hands while others live only on your friend's hands.

When you work on a computer you leave the microbes from your hands on the keyboard. The scientists can easily tell the owner of the keyboard by looking at the microbes on it. Even if you don't leave your fingerprints behind, your microbes may give you away.

Noah Fierer, a scientist, says. "You can only clean a fingerprint, but you can't sterilize (使无菌) a surface just by wiping(擦) it off," He says that scientists have a lot more work to do before the microbe is used as a useful tool.

1.According to the passage,_______ could be used to identify the criminal.

A. fingerprints    B. scientists' hands

C. microbes        D. fingerprints and microbes on people's hands

2.Paragraph 3 tells us that________.

A. our hands look similar             B. the microbes will make the keyboard dirty.

C. we should compare hands often     D. we have our own sets of microbes.

3.When you work on computer, the microbes________.

A. just stay on our hands B. also stay on the keyboard

C. will do harm to you D. will disappear

4.From Noah Fierer we know that________.

A. fingerprints are no longer useful in fighting crime

B. microbes can be found on everyone's hands.

C. unlike microbe fingerprints can be cleaned if people wipe them

D. the microbe is used as a useful tool

5.What’s the best title of the passage?

A. Microbes May Tell Who You Are               B. Scientists Say Everyone Has Microbes

C. Noah Fiercer Does Research Into Microbes    D. Fingerprints Help Catch Criminals

 

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One day a big cat was going into a forest to find something to eat. On his way he met his friend, the old owl(猫头鹰).  The owl greeted him, “Good morning, my dear friend. Where are you going?”  “I’m going to the forest to look for some birds to eat.” The cat answered. “But be careful not to catch any of my children.” The owl said to the cat. “OK,” the cat said. “But what do your children look like?” “Oh,” the owl said, “they are the most beautiful birds in the forest.”

“All right, I know that.” The cat said and walked on to the forest.

The cat entered the forest and saw many beautiful birds here and there. He remembered what the owl had told him and went away. Then after a long time, he saw some ugly birds in a nest. He sat down and ate them one by one. When the owl came back to her nest, she found it was empty.

1.The cat went to the forest            .

A.to meet his friend

B.because he was hungry

C.to see the tree

D.to visit the owl

2.The old owl        the cat.

A.knew

B.ate

C.didn’t like

D.didn’t see

3. When the cat saw the beautiful birds, he           .

A.didn’t eat any of them

B.ate only a few of them

C.caught some but let them go

D.ate all of them

4.The old owl’s children were           .

A.beautiful

B.ugly

C.nice to the cat

D.the cat’s friends

5.The owl’s nest was           .

A.near the cat’s home

B.in a small tree

C.on the ground

D.in the forest

 

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A rabbit is running into his hole. You may ask, “What happened?”
Well, when a rabbit sees something dangerous, it runs away. Its tail moves up and down as it runs. When other rabbits see this tail moving up and down, they ran, too. They know there is danger. The rabbit has told them something without making a sound. It has given them a signal.
Many other animals use this kind of language. When a bee finds some food, it goes back to his home. It can’t tell the other bees where the food is by speaking to them, but it does dance in the air. This tells the bees where the food is.
But animals say things by making sounds. A dog barks, for examples, when a stranger comes near. A cat purrs(发出呼噜呼噜的声音) when pleased. Some birds make several different sounds, each with its own meaning.
But human beings have something that no animals have---- a large number of words about things, actions, feelings or ideas. We are able to give each other information to tell or inform other people what is in our mind or how we feel. By writing words down we can remind ourselves of the things that have happened, or send messages to people far away. No animals can do this. No animals has the wonderful power of language.
No one knows how man learned to make words. Somehow he learned to make them. As centuries went by, he made more and more new words. This is what we mean by language.
People in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. A very large English dictionary, for examples, contains four or five hundred thousand words. But we don’t know all these. The words we know are called vocabulary. We should try to make our vocabulary larger. Read as many books as possible. When we met a new word, look it up in the dictionary. A dictionary is the most useful book.
【小题1】What’s the meaning of the underlined word?
A.标语B.信号C.唱片D.图像
【小题2】A dog can tell something__________.
A.by giving signalsB.by making different sounds
C.by purringD.by barking
【小题3】It has been proved that no animals are able to_________.
A.give the others information
B.express their actions and feelings with words
C.tell others how they feel
D.make different sounds, each with its own meaning.
【小题4】Generally speaking, what we mean by “vocabulary” is_______.
A.all the words that we knowB.more and more words we use
C.all the words we needD.the dictionary which contains thousands of words
【小题5】What must we do in order to make our vocabulary larger?
A.Make more and more new words
B.look up some new words in a dictionary
C.learn more language
D.Try to read as many books as possible
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