What is really happening? You do not see through the glass of a mirror as you do through a window. The glass of a mirror has a silver coating on the back. The light from the sun or a bulb bounces (弹回)off you ,goes into the mirror ,and bounces straight back out to you again.

Mirrors have been used for thousands of years. The earliest were round pieces of shiny metal. Glass mirrors came late. The ancients thought that a mirror was magic. They did not understand how it worked. They thought they saw their spirits in a mirror and breaking a mirror brought bad luck.

Today mirrors have many uses .For example, they can make rooms look bigger and prettier. They also show us if our hair is combed(梳理) well and our faces are clean. On cars, buses and trucks, mirrors help drivers see traffic behind them. Mirrors are also used in telescopes(望远镜)and searchlights(探照灯).

Fun houses use mirrors. They make people look funny. Some mirrors are curved to make people seem short and round or tall and tin They make people laugh at themselves.

1.If you wave your right hand, you can see your In the mirror.

A. left hand down B. left hand wave

C. right hand wave D. right hand up

2.Mirrors .

A. appeared a long time ago

B. were made of glass at first

C. made of metal are popular today

D. had many uses in ancient times

3.Mirrors were magic in the past because .

A. people thought they could see their spirits in mirrors

B. they were used in magic shows

C. they could make people change their heights and weights

D. they could make people laugh

4.What does the word “curved” mean in Chinese?

A.雕刻 B.油漆 C.扭转 D.弯曲

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Look into the mirror and what do you see? You see yourself. But when you move. you do everything backward(相反地)in the mirror! If you wave your left hand, your right hand waves in the mirror. If you wink your right eye, your left eye, your left eye winks(眨). Try to read a page in the mirror .The words will be backwards.
What is really happening? You do not see through the glass of a mirror as you do through a window. The glass of a mirror has a silver coating on the back. The light from the sun or a bulb bounces (弹回)off you ,goes into the mirror ,and bounces straight back out to you again.
Mirrors have been used for thousands of years. The earliest were round pieces of shiny metal. Glass mirrors came late. The ancients thought that a mirror was magic. They did not understand how it worked. They thought they saw their spirits in a mirror and breaking a mirror brought bad luck.
Today mirrors have many uses .For example, they can make rooms look bigger and prettier. They also show us if our hair is combed(梳理) well and our faces are clean. On cars, buses and trucks, mirrors help drivers see traffic behind them. Mirrors are also used in telescopes(望远镜)and searchlights(探照灯).
Fun houses use mirrors. They make people look funny. Some mirrors are curved to make people seem short and round or tall and tin They make people laugh at themselves

1.
If you wave your right hand, you can see your In the mirror
1. A.
  left hand down
2. B.
  left hand wave
3. C.
  right hand wave
4. D.
  right hand up
2.
Mirrors
1. A.
  appeared a long time ago
2. B.
  were made of glass at first
3. C.
  made of metal are popular today
4. D.
  had many uses in ancient times
3.
Mirrors were magic in the past because
1. A.
  people thought they could see their spirits in mirrors
2. B.
  they were used in magic shows
3. C.
  they could make people change their heights and weights
4. D.
  they could make people laugh
4.
What does the word “curved” mean in Chinese?
1. A.
  雕刻
2. B.
  油漆
3. C.
  扭转
4. D.
  弯曲

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Look at the photo of a boy. Do you know who he is? Many Chinese people know him very well now. His name is Lin Hao. He is only nine years old now, but he can save his two partners during the earthquake in Sichuan on May 12, 2008. He carried his two partners with his weak back at that dangerous time. And they got nothing about his parents then. His fourteen-year-old sister took them away and walked seven hours difficultly. At last, they got to Du Jiangyan City safely. He was very calm when he appeared in the picture of the reporter’s cameral. Just as his brave behavior, we are all moved. And he was named “Ten Little Heroes during the Earthquake” by CCTV.
At the same time, another nine children were named “Ten Little Heroes during the Earthquake” by CCTV. Lei Chunian, a 15-year-old child, is a middle school student. He did not run out when the earthquake happened, instead he ran into the classroom and found his seven classmates were sitting at the corner of the classroom. He took them away at once. On the half way, he found there were only six. At that very dangerous time, he ran back to the classroom again. He found a girl crying there because of fearing. He asked her to run away quickly. But she was too afraid to move. So he carried her and ran out of the classroom. A few seconds later, the building fell down and they were all safe.
Let’s remember all these little heroes for ever. They are Ren Dong, Ning Jiaci, Dong Yupei, Liu Li, Tang Fuwen, Kang Jie, Zhou Wen, Yin Quankui and Zhu Hualin. We should learn their spirit of helping others during the dangerous time. Among them, Liu Li and Zhou Wen lost their lives. Zhou Wen is a Tibet (藏族) girl.
(   ) 1. Lin Hao saved ________ during the earthquake on May 12, 2008.
A. one boy       B. one girl      C. two partners of his   D. two teachers of his
(   ) 2. We all moved by little Lin Hao because he was _______ when he appeared in the picture of the reporter’s camera.
A. brave         B. angry        C. frightened          D. calm and brave
(   ) 3. Lei Chunian didn’t _______ when the earthquake happened.
A. run out        B. wake up     C. go to school         D. stand up
(   ) 4. _______ and _______ lost their lives among these ten little heroes.
A. Lei Chunian; Lin Hao            B. Liu Li; Zhou Wen
C. Kang Jie; Tang Fuwen            D. Dong Yupei; Zhou Wen
(   ) 5. Lei Chunian ran back to the classroom because one of his classmates was ______ in the corner of the classroom because of fearing.
A. sleeping       B. crying         C. reading              D. lying 查看习题详情和答案>>

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.
【小题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

【小题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.

【小题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

【小题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

【小题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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If you wave your right hand, you can see your In the mirror

Mirrors

Mirrors were magic in the past because

What does the word “curved” mean in Chinese?

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