It seems to be strange to you there is a blind spot on the eyes. Here is an interesting experiment 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 eye. 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.

1.The writer of the passage thinks that _____ there is a blind spot on the eye.

A. few people know B. no one knows

C. most people know D. all the people know

2.“a blind spot” in the passage means ________ in Chinese.

A.污點(diǎn) B. 消散 C. 盲點(diǎn) D. 遺失

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

4.The passage mainly (主要) tells us _______.

A. how to find the blind spot

B. an interesting experiment

C. where the blind spot is

D. there is blind spot on the eye

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語(yǔ) 來(lái)源：2014-2015學(xué)年四川安岳七年級(jí)上學(xué)期期末教學(xué)質(zhì)量監(jiān)測(cè)英語(yǔ)試卷（解析版） 題型：選詞填空

短文填空。用方框中詞的正確形式填空，將短文補(bǔ)充完整。

photo, strawberry, like, play, and,

four, go, be, fat , on,

Hello. My name 1. Linda. There are2. people in my family — my father, my mother, my brother Henry and I.

My parents are both teachers. I like going to school. I 3. to school by bike every day. For breakfast, I 4. bread, milk and fruit. For lunch, I have some rice, chicken and 5. . I only like rice and vegetables for dinner, because I don’t want to be 6. .At night, I read some books before I go to bed. I have many books7. my bookcase. Two nice 8. of my family are on my desk.

My brother Henry likes sports9. he has a basketball. He often 10. basketball with his friends after school.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2015-2016學(xué)年山東東營(yíng)懇利縣八年級(jí)上學(xué)期期中英語(yǔ)試卷（解析版） 題型：閱讀理解

Are you sorry for not traveling during the National Day? If you stay at home at that time, I think you are very lucky. Why? Because there are too many people everywhere. In many places of interest in China, it’s too crowded to do anything.

Look at the picture. It was too crowded in the West Lake on October 1st, 2015. You even couldn’t take photos for you or your friends. All what we could see where people. It was reported that there were about 13 people per meter by the lake. My friends told me they could see nothing but many tourists on the Broken Bridge (斷橋). “We couldn’t walk if the people in front of us didn’t walk,” he said. He showed us a photo near the West Lake. In the photo, we hardly found him out, there were too many people.

So some people give the advice that we should not have the gold week (黃金周) any more. But other people say no about this advice. What’s your idea of it? Are you sorry now for not traveling during the gold week? I love staying at home more than traveling next National Day.

1.When is the gold week in the passage?

A. In January. B. In April.

C. In August. D. In October.

2.Why can’t the writer’s friends find themselves in the picture?

A. Because he didn’t go there.

B. Because there were too many people.

C. Because he was taking the photo.

D. Because their eyes were ill.

3.How did the writer feel about staying at home on National Day?

A. He felt lucky to stay at home on National Day.

B. He felt sorry to stay at home on National Day.

C. He believed it was boring to stay at home on National Day.

D. He believed it was interesting to stay at home on National Day.

4.Which of the following is TRUE about the West Lake on National Day?

A. There were about 30 people per meter.

B. You could walk as you like by the West Lake.

C. There were about 13 people per meter by the lake.

D. You could find yourself easily on the photos you took that day.

5.Where do you think is the article from?

A. www.chinabus.com. B. www.movies123.com.

C. www.chinatourist.com. D. www.storyhouse.com.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2015-2016學(xué)年山東德州慶云第二中學(xué)八年級(jí)上學(xué)期期中英語(yǔ)試卷（解析版） 題型：單項(xiàng)填空

. ---Whose book is it?

---look! Jane’s name is on the cover(封面). It _________ hers.

A.can’t be B.must be C.should be D.must is

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2016屆江蘇無(wú)錫璜塘、峭岐九年級(jí)上學(xué)期12月聯(lián)考英語(yǔ)試卷（解析版） 題型：其他題

任務(wù)型閱讀

Trees are one of the oldest plants of our earth．Just like us，trees change a lot when they grow. At one to three years old，young trees learn how to protect themselves. For example，many trees grow thorns (刺) to tell animals not to go near. Most young trees have large, deep green leaves so that they can catch enough sunlight and change it into their food and energy.

When trees are 4 years old，they begin to grow very fast and become strong enough to face challenges (挑戰(zhàn)) in life.

At the age of l5，trees become young adults. They grow more slowly and begin to grow flowers and fruit.

It is not until the trees are 20 to 25 years old that they become real adults．The trees reach their largest sizes. Adult trees give us many things such as oxygen (氧氣) and natural beauty. If we give them good care，they will go on to live healthily for many years．

As time goes on，trees begin to grow older and older and even die．At this time，they still have their important place in nature．In many ways，the life of trees is like our own life experience.

Enjoy every minute of the life of the trees and take care of them!

Title: The 1. of trees

2.

Growing

Things they can do

1～3

Growing thorns；

Having large, deep green leaves

Learn to protect themselves；

3. enough sunlight and change it into their food and energy

4

Growing very fast；

Becoming strong enough

Face challenges in life

15

Becoming young adults；

Growing more 4.

Grow flowers and fruit

20～25

Becoming real adults；

Reaching their largest sizes

Give people many things 5.

oxygen and natural beauty

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2016屆江蘇無(wú)錫璜塘、峭岐九年級(jí)上學(xué)期12月聯(lián)考英語(yǔ)試卷（解析版） 題型：單項(xiàng)填空

--- What do you think of the newest Monkey King: hero is back movie?

--- It’s great! I haven’t seen a _________ one for years!

A. worst B. worse C. best D. better

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2016屆江蘇無(wú)錫江陰長(zhǎng)壽中學(xué)九年級(jí)上學(xué)期12月月考英語(yǔ)試卷（解析版） 題型：閱讀理解

Join Us for a Day at Sun Valley Amusement Park (樂(lè)園)

Children aged 10 to 14 are invited to take part in the “Event of the Summer” at Sun Valley Amusement Park, the most popular amusement park on the East Coast. Sun Valley has more than 80 amusement rides. For sports lovers, there are basketball courts, an indoor baseball field, and climbing walls.

No amusement park would be complete without a gift shop. Sun Valley has two.

You won’t want to miss out on this day of fun. Join us at Sun Valley Amusement Park on July 14. Register (登記) early.

The cost of the trip is $25. This includes tickets and all rides.

We suggest that all children bring lunch.

Buses leave at 9:00 AM and return at 5:00 PM.

Rain Date: Wednesday, July 16.

Register at the Children’s Recreation Center at the Town Hall by July 3.

A one-day registration will also be held on July 1 at the Brown School.

For more information, call Jane Parks at 555-7267

1.Who can take part in the “Event of the Summer”?

A. Children under 5 B. Children over 16

C. Children aged 10-14 D. Children aged 5-9

2.The children had better bring __________.

A. a basketball B. lunch C. a gift D. gloves

3.When can children register at the Brown School?

A. On July 1 B. On July 3

C. On July 14 D. On July 16

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2015-2016學(xué)年遼寧大石橋水源二中八年級(jí)上學(xué)期期末模擬英語(yǔ)試卷（解析版） 題型：補(bǔ)充句子

補(bǔ)全對(duì)話(huà)

根據(jù)對(duì)話(huà)內(nèi)容, 從方框中所給的七個(gè)選項(xiàng)中選出五個(gè)句子補(bǔ)全對(duì)話(huà), 使對(duì)話(huà)完整、通順。

A. I’ll bring it to you next weekend.

B. Can you give me some advice?

C. Yes, it’s wonderful.

D. And the prices there are cheap.

E. I only have T-shirts and jeans.

F. Certainly, I agree with you.

G. Then what clothes should I wear?

Jane: Linda, what are you worried about?

Linda: I will go to a concert with my teacher next weekend. I want to dress smartly. 1.

Jane: Certainly. Do you have any nice clothes?

Linda: No, I don’t. 2.

Jane: It’s not good to wear such clothes to the concert.

Linda: 3.

Jane: You are tall and thin. I think a dress will be nice on you.

Linda: Where should I buy a dress?

Jane: Mary’s Clothes Store in the neighborhood. 4. Let’s go and choose one.

Linda: Great.

Jane: If you wear my necklace(項(xiàng)鏈), you will be more beautiful. 5.

Linda: Thank you very much.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2016屆甘肅嘉峪關(guān)市九年級(jí)上學(xué)期末英語(yǔ)試卷（解析版） 題型：單項(xiàng)填空

Don’t worry. We’ll try to make at home.

A. her to feel B. her feel

C. herself to feel D. herself feel

查看答案和解析>>

同步練習(xí)冊(cè)答案