It seems to be strange to you that there is a blind spot (盲點(diǎn))on the eyes. Here is an interesting experiment (實(shí)驗(yàn)) that can make something disappear, when one eye is open.
Make a card about the size of a postcard and write two English letters L and R on it, L on the left and R on the right. First, hold the card about 80 cm away and you see both the letters. Then close your right eye and look at the letter R only with your left eye. And now, as you move the card slowly towards you, you’ll find the letter L disappearing. But if you move the card nearer to your face, the letter will be seen again. Now do the same experiment with your left eye closed, you’ll find the letter R disappearing.
Why does the letter disappear? It is because there is a blind spot on the eyes. When the image (影像) of the letter falls on the blind spot, it won’t be seen. That is why either of the letters disappears.
【小題1】The writer of the passage thinks that ________ there is a blind spot on the eyes.

A．few people know
B．no one knows
C．most people know
D．a(chǎn)ll the people know
【小題2】The word “disappear” in the passage means ________ in Chinese.
A．出現(xiàn)B．遠(yuǎn)離C．消失D．靠近
【小題3】You fail to see the letter L in the experiment because ________.
A．your eyes are poor
B．its image falls on the blind spot
C．your left eye is not open
D．you move it close to your eye
【小題4】In which order (順序) should you do the experiment?
①Hold the card
②Move the card nearer
③Close your right eye
④Write two English letters
⑤Look at the letter R
⑥Make a card
A．④⑥①②③⑤B．①③⑥④⑤②
C．⑥①④③②⑤D．⑥④①③⑤②
【小題5】The passage mainly (主要) tells us ________.
A．the blind spot can move
B．a(chǎn)n interesting experiment
C．where the blind spot is
D．there is a blind spot on the eyes


【小題1】A
【小題2】C
【小題3】B
【小題4】D
【小題5】D

解析

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：初中英語 來源：2012屆江蘇省無錫市東亭中學(xué)初三上學(xué)期期末考試英語試卷（帶解析） 題型：完型填空

Do you know how to study better and make your study more effective(有效)? We all know that Chinese students usually study very hard for a long 35. This is very good, but it doesn't 36 a lot. An effective student must have enough sleep, enough food, enough rest and exercise. You need to go out for a walk or visit some friends or some nice places. It's good for your study.
When you return  37  your studies, your mind will be refreshed(清醒的) and you'll learn more  38  study better. Psychologists（心理學(xué)家）39  that learning takes place in this way. Here take English learning  40  an example. In the first few months you can make progress and you feel happy. Then your language study seems 41  on the same level. So you will think you're learning  42  and you may give up. This can last for days or even weeks, yet you needn't give up. At some point your language study will take another big  43  again. You'll see that you really have been learning all along. If you get enough sleep, food, rest and exercise, studying English can be very effective and interesting. Don't  44  along the way. Learn slowly and you're sure to get a good result.

【小題1】
A．dayB．timeC．hourD．week
【小題2】
A．helpB．giveC．makeD．take
【小題3】
A．a(chǎn)fterB．forC．a(chǎn)tD．to
【小題4】
A．yetB．a(chǎn)ndC．orD．but
【小題5】
A．findB．teachC．tellD．remember
【小題6】
A．withB．forC．a(chǎn)sD．to
【小題7】
A．to haveB．to makeC．to takeD．to stay
【小題8】
A．somethingB．a(chǎn)nythingC．nothingD．everything
【小題9】
A．workB．jumpC．walkD．result
【小題10】
A．get upB．set upC．give upD．wake up

查看答案和解析>>

科目：初中英語 來源：2010年天津市高中階段教育學(xué)校招生統(tǒng)一考試英語卷 題型：閱讀理解

Dear Annie,
I have never written a letter to a newspaper before, I have just never felt the need to do such a thing. I have always felt I was quite able to do everything by myself. But now I know I was wrong.
Sometimes you really need help in life, I guess. And that’s why I’m writing this letter to you.
I have a happy family. I love my children and they love me . I’m a mother of three children. I know well how to bring up (帶大)children, and two of them are already over twenty, so it is nothing new for me.
But now I have a serious problem: the Internet problem. My little son is just sixteen, and I feel he should do a lot of homework now , but he doesn’t seem to be interested in it . He can happily spend six or eight hours at a time on the Internet every day , He chats with people that he has never met before , but speaks little to us .He does lots of useless things on the Internet. And he sees red if you ask him to do his homework.
I just want him to be a good student . Now he seldom does his lessons at home. I’m afraid he will drop behind in his class soon. His father is a doctor , a very kind man . He never seems to be afraid of his father.
What can I do ?And don’t tell to talk to him. We’ve tried that and it didn’t work. But this is really a big problem in our family. I have tried everything I can think of . I
wonder how the Internet is so attractive(有吸引力的).You’re my last hope. Please tell me what I can do!
Yours,
Ellen Smith
【小題1】Mrs Snith wrote to Annie because　　　　　　　.

A．she often asked others for help
B．she thought she was a great mother
C．she didn’t know how to stop his son surfing the Internet
D．she didn’t know how the Internet was so attractive
【小題2】What might NOT Mrs Smith’s son do on the Internet?                       
A．Send e-mails to his friendsB．Prepare for his lessons
C．Chat with strange peopleD．Read the news
【小題3】What does the phrase “he sees red” mean in this passage?                   
A．He feels sorryB．He feels happy
C．He becomes frightenedD．He becomes angry
【小題4】What do you think of Mr.Smith?                   
A．An irresponsible(不負(fù)責(zé)任的)father who never taught his son
B．A very excellent doctor who was busy with his work and had no time to teach
his son
C．A very kind man who loved his son
D．A man who always made his son be afraid of him but failed

查看答案和解析>>

科目：初中英語 來源：2011-2012學(xué)年浙江省新昌縣實(shí)驗(yàn)中學(xué)初二下學(xué)期期中英語試卷（帶解析） 題型：閱讀理解


What does a UFO look like? Do you believe there are aliens outside the earth? Maybe nobody can tell us exactly, but some of us believe that we humans are not alone in this world. We have friends living outside the earth. And a lot of people in the world think they really have seen a UFO flying in the sky. Now many scientists are trying to understand the origin of the UFO sightings. Scientists even try to draw pictures about aliens and aliens’ life according to their imagination.        
Because we don’t really know about it, we call it UFO or Unidentified Flying Object. Many of us are curious(好奇的) about it and interested in it very much.
While scientists have no same ideas about whether there is an alien or not, it seems that China has been home to some UFO sightings recently.
On August 20th,2011, a UFO was seen at 21:00 by the pilot on the plane which took off from Pudong International Airport to Changchun. At almost the same time, many astrophiles(天文愛好者)took pictures of it. Later, reports from some cities said that the UFO was seen. The pilot said the UFO was small at first, then expanded(擴(kuò)大),moved north, and disappeared(消失)several minutes later. However, he couldn’t exactly make sure about what he had seen.
【小題1】What do scientists know about the aliens according to this passage?

A．Scientists know about the aliens’ life well.
B．Some scientists try to imagine aliens’ life.
C．Scientists have the same idea about the UFO.
D．Many scientists have already understood the origin of the UFO sightings.
【小題2】What happened on August 20th,2011?
A．A UFO took off from Pudong International Airport.
B．A pilot took pictures of the UFO.
C．Many astrophiles saw the UFO.
D．The UFO was small when it moved north.
【小題3】Which of the following sentences is NOT true according to this passage?
A．UFO is short for Unidentified Flying Object.
B．Some people from some cities said that they saw the UFO on August 20th,2011.
C．The pilot could exactly make sure what he had seen.
D．Many of us are interested in the UFO.

查看答案和解析>>

科目：初中英語 來源：2011年江蘇省常州市實(shí)驗(yàn)中學(xué)中考模擬試卷（英語） 題型：閱讀理解

First Frenchman: I once heard someone shout, “Look out,” I put my head out of a window and a basin (盆) of water fell on me. It seems that “Look out” may mean “don’t look out.”
　　Second Frenchman: Once I was on a ship and heard the captain (船長) shout, “All hands on deck,” I put my hands on the deck and someone walked on them.
　　Third Frenchman: I once visited an English friend early in the morning and the maid who came to the door and said, “He’s not up yet. Come back in half an hour,” When I went again for him, she said, “He’s not down yet.”
　　“If he’s not up and he’s not down, where is he?” I asked.
She said, “He’s still in bed. When I say ‘He’s not up ’  I mean ‘he has not yet got up’. When I say‘He’s not down ’I mean ‘he has not yet come downstairs.”
【小題1】“Look out”here means “ _______”.

A．put your head out of the window and look
B．Take care
C．I’m going to pour the water
D．Help me
【小題2】“All hands on deck”means “ _______ ”.
A．All the sailors gather ( 集合 )on deck
B．Give your hands to me
C．Put your right hand and left hand on deck
D．Shake your hands with me
【小題3】When the third Frenchman went back, the English friend _______ .
A．was washing his face
B．was having his breakfast
C．was still in an upstairs room
D．was reading a newspaper

查看答案和解析>>

科目：初中英語 來源：2013屆江蘇省興化市四校初二第三次月考英語試卷（解析版） 題型：單詞拼寫

Jack went to a barber’s shop and had his hair cut, but when he came out, he was not (1)_h_______ with the result. When his friend Bob saw him, he (2)l_______ and said, “What happened to your hair, Jack?”

Jack said, “I tried a new barber’s shop today, because I wasn’t quite satisfied with the (3)o_______ one, but this one seems even (4)w_______.”

Bob agreed. “Yes. I think you are right, Jack. Now I’ll tell you (5) w_______ to do when you go into a barber’s shop (6)n_______ time. Look at the barber’s hair, find out whose hair (7)l_______ worst, and then go straight to him.”

“Why shall I go to him?” Jack asked, “But that would be foolish.”

“Oh, no, it wouldn’t.” said Bob. “Who cut that man’s (8)h_______? Just think it over. He couldn’t cut it (9)h_______, could he? One of the (10)o_______ barbers cut it. So you know he can’t be the worst barber.”

 

查看答案和解析>>

同步練習(xí)冊答案