精英家教網 > 初中英語 > 題目詳情

Spending two or three hours playing outdoors each day can reduce(減少)a child's chance of becoming short-sighted (近視), research shows. It challenges the belief that short-sightedness

is caused by computer use, watching TV or reading in weak light.

Australian government researchers believe that sunlight is good for people's eyes.They compared the vision(視力) and habits of 100 seven-year-old children in China and Australia. In all, 30% of the Chinese children were short-sighted. This percentage was ten times higher than Australian children.

Both groups spent a similar amount of time reading, watching TV and playing computer games. However, the Australian children spent an average of two hours a day outdoors-90 minutes more than the Chinese children.

Professor Ian Morgan said, "Humans are naturally long-sighted, but when people begin to go to school and spend little or no time outdoors, the number of short-sighted people gets larger. We are also seeing more and more short-sighted children in cities all around the world-and the main reason may be that city children spend less time outdoors."

Daylight can be hundreds of times brighter than indoor light. But why does playing outside prevent us from becoming short-sighted? Scientists believe that natural light has a special chemical (化學物質)which stops the eyeball from growing out of shape and prevents people from becoming short-sighted.

So go outdoors. It doesn't matter if that time is spent having a picnic or playing sports.

1.What can reduce a child's chance of becomingshort-sighted according to the passage?

A. Playing computergames. B. watching TV.

C. Reading books. D. Playing outdoors

2.What does the underlined word "percentage"mean?

A. 百分比 B. 功率 C. 平均分 D. 效率

3.How much time did the Chinese children spend outdoors every day?

A. 2 hours. B. 90minutes. C. 1 hour. D. 30 minutes.

4.What is the fifth paragraph mainly about?

A. Why people become short-sighted.

B. Why natural light has a special chemical.

C. Why playing outside is good for one's eyesight.

D. Why daylight is much brighter than indoor light.

練習冊系列答案
相關習題

科目：初中英語 來源：人教版九年級Unit2 I think that mooncakes are delicious周周清 題型：單選題

Jane enjoys______with her friends.

A. eat out B. eating out C. eats out D. to eat out

查看答案和解析>>

科目：初中英語 來源：外研版七年級英語上冊Module 7模塊單元測試卷 題型：單選題

—Do the students often______online______school?

—No，sometimes.

A. play；at B. go；with

C. go；at D. play；in

查看答案和解析>>

科目：初中英語 來源：2018-2019學年七年級英語上冊（人教版）Unit 6綜合檢測卷 題型：單選題

I like bananas, but Linda doesn't like ________．

A. it B. them C. this D. these

查看答案和解析>>

科目：初中英語 來源：2018年秋人教版九年級英語下冊（山西）習題：Unit12 1第一課時 題型：單選題

My aunt drove by and gave me a ________ on the way home.

A. walk B. lift C. way

查看答案和解析>>

科目：初中英語 來源：江蘇省蘇州市2018年中考英語專題練習《閱讀理解》（3） 題型：閱讀單選

Mr. and Mrs. Smith have just opened a small restaurant. In order to attract customers, they put a notice in front of the restaurant, which said: “Meals on the house for three days.”

A foreign student who didn’t know much English passed by the restaurant on the second day. It was lunchtime and he felt hungry. “Well, here is a restaurant. I’m going to have something to eat,” he said.

He saw the notice when he walked towards the restaurant. “American people are really strange. They even eat dinners on the house! But how can I get onto the top of the house?” he asked himself.

He looked around and found a ladder（梯子）against a tree nearby. He was very glad. But as he reached the top, he heard someone shouting at him: “Hey, what are you doing up there?” Mr Smith was looking at him angrily. Beside him was a policeman.

“Doesn’t your notice say ‘Meals on the house for three days’? Is it just a joke?” the foreign student answered.

On hearing this, both Mr Smith and the policeman burst into laughter(開懷大笑). “Do you know what On The House means?”

Do you know the meaning of On The House?

1.The Smiths have ____________.

A. opened a restaurant B. built a house

C. climbed onto the top D. been policemen

2.The student walked past the restaurant ___________.

A. when the Smiths started their business

B. when the Smiths put on the notice

C. when the policeman came to the restaurant

D. when it was time to have lunch

3.The student ____________ so Mr Smith shouted at him.

A. was very hungry

B. knew little about English

C. climbed onto the top of the house

D. took away the ladder

4.“On the house” may mean that the meal _____________.

A. is had on the house B. is paid on the house

C. is made on the house D. is free for the customers

查看答案和解析>>

科目：初中英語 來源：江蘇省蘇州市2018年中考英語專題練習《閱讀理解》（3） 題型：閱讀單選

You want to know about my staying in America, right? Well, to tell you the truth, it is really an eye-opening experience to study here.

In China, I had English classes five times a week since the fifth grade. ①However, I didn't know how different textbook English could be from everyday English until I came to Hotchkiss School, Connecticut.

When I first studied English, I was told to say "I am fine." when people say "How are you?" But in the US, I found that people say, "I am good." or "I'm tired."

One day, someone greeted me with "What's up?" It made me confused. I thought for a moment and then smiled because I didn't know what to say.

Since then, I have discovered more and more differences between Chinese and US cultures.

To my surprise, US girls spend a lot of time in the burning sun to get a tan. However, in China, girls try every possible way to get their skin paler, or "whiter".

I was also surprised by how hard-working US students are. In China, schoolwork is almost everything, so we study hard and that's it. But here, a "good" student gets good grades, does a lot for the public and plays sports or music.

The kids here are so talented. ②I am starting to be sorry that I gave up playing the piano at an early age and that I have never thought about sports.

1.According to the writer, textbook English is everyday English.

A. quite different from B. the same as

C. more different than D. easier than

2.What does the word "tan" in the sixth paragraph mean in Chinese?

A. 曬黑 B. 曬白 C. 能量 D. 熱量

3.A good US student spends his / her time_______.

A. only in doing homework

B. only on sports or music

C. on studies, sports or music and public work

D. on public work

4.Which is the best title for the passage?

A. My Own Travel in the US B. My Studying in the US

C. My Opinion About the US D. My Poor English in the US

查看答案和解析>>

科目：初中英語 來源：2018-2019學年七年級英語上冊（人教版）Unit 5綜合檢測卷 題型：材料作文

書面表達

根據(jù)提示寫一篇50詞左右的英語短文介紹一下你的朋友Jim。

提示：

1．他的體育用品：10個籃球、4個足球、2個乒乓球、15個排球、9個棒球、8個網球拍；

2．他最喜歡打網球；

3．他喜愛運動，因為運動對健康有益；

4．他經常放學后和他的朋友們打網球和籃球。

參考詞匯： 健康health；網球拍tennis racket

Jim has a great sports collection(藏)．

________________________________________________________________________

________________________________________________________________________

查看答案和解析>>

科目：初中英語 來源：人教新目標八年級英語上冊Unit 3　I 題型：單選題

My friend Tina enjoys ________ to me. She's my good ________．

A. listening; listener B. listening; listening

C. listen; listener D. to listen; listen

查看答案和解析>>

同步練習冊答案