We all enjoy the beautiful show of colours as leaves change each autumn. But did you ever wonder how and why this happens?
Leaves are nature’s food factories. Plants take water from the ground through their roots and take carbon dioxide (二氧化碳) from the air. Plants use sunlight to turn water and carbon dioxide into glucose (葡萄糖). Glucose is a kind of sugar, which plants use as food for energy and growing.
The way plants turn water and carbon dioxide into sugar is called photosynthesis that means “ putting together with light”. A chemical called chlorophyll helps photosynthesis. It gives plants their green colour. As summer ends and autumn comes, the days get shorter and shorter, and trees “know” to begin getting ready for winter.
During winter, there is not enough light or water for photosynthesis. Trees rest during this time and live on the food they store during the summer. They begin to shut down their food-making factories.
As the green chlorophyll disappears from the leaves, we begin to see yellow and orange leaves. Small amounts of these colours have been in the leaves all along. We just can’t see them in the summer, because they are covered up by the green chlorophyll.
The bright reds and purples we see in leaves are made mostly in autumn. In some trees, like maples (楓樹), glucose is caught in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn turn this glucose into a red colour. The brown colour of trees like oaks (橡樹) is made from waste left in the leaves.
It is the mixture of all these things that makes the beautiful colours we enjoy during autumn.
( ) 51. The word “chlorophyll” in the third paragraph means _______ in Chinese.
A. 葉綠素 B. 氧氣 C. 胡蘿卜素 D. 蛋白質(zhì)
( ) 52. The leaves of the trees in autumn turn yellow because of the short of _____.
A. water and carbon dioxide B. glucose and energy
C. sunlight and water D. sunlight and carbon dioxide
( ) 53. The way that _______________________ is called Photosynthesis .
A. plants change water and carbon dioxide into sugar
B. plants turn water and carbon dioxide into sugar with the help of sunlight
C. plants use glucose as food for energy and growing
D. chlorophyll is a great help
( ) 54. Which of the following is NOT true?
A. When autumn and winter come, the days get shorter and shorter.
B. During winter trees rest and live on the food they store during the summer.
C. During winter small amounts of yellow and orange colours are kept in the leaves all the time.
D. Trees begin to stop making food in summer.
( ) 55. This passage tells us __________________.
A. all the plants can grow well with the strong sunlight
B. there are all kinds of plants on the earth
C. all the colours of the leaves aren’t made from chlorophyll
D. maples and oaks have the same reason as other trees for the change of colours
年級 | 高中課程 | 年級 | 初中課程 |
高一 | 高一免費(fèi)課程推薦! | 初一 | 初一免費(fèi)課程推薦! |
高二 | 高二免費(fèi)課程推薦! | 初二 | 初二免費(fèi)課程推薦! |
高三 | 高三免費(fèi)課程推薦! | 初三 | 初三免費(fèi)課程推薦! |
科目:初中英語 來源:2012-2013學(xué)年江蘇揚(yáng)州市江都區(qū)雙溝中學(xué)初一10月練習(xí)英語試卷(帶解析) 題型:完型填空
Hello, I’m David. I’m a middle school student. It’s nice to meet you here. First, let me tell you __36___ about my family. There are five people in my __37___. They are my mother, my father, my sister, my brother and me.
My father is a worker, and my mother is an English teacher. My sister is 18 and my brother is 16. I’m 14. we are ___38____the same school. We all enjoy ___39___football games.
My __40___ is on West Street. There is a big tree and some small trees around my house. The big one is a pear tree and the small ones are apple ___41__, ___42__ there ___43__any pears or apples on them now. ____44___a photo of my house. In the photo, you can see three cats in my house. They are all black and white. We ___45___ them very much.
【小題1】A. anything B. something C. thing d. anyone
【小題2】 |
|
【小題3】 |
|
【小題4】 |
|
【小題5】 |
|
【小題6】 |
|
【小題7】 |
|
【小題8】 |
|
【小題9】 |
|
【小題10】 |
|
查看答案和解析>>
科目:初中英語 來源:2013屆浙江省杭州市啟正中學(xué)九年級中考二模(5月)英語試卷(帶解析) 題型:閱讀理解
Take a look at teenagers around, dressed in baggy-pants (寬松褲), drinking soft drinks such as coke, reading Japanese cartoons. Whether you are in Beijing, Wuhan or Hong Kong, you will get the same impression. But should we copy others or should we maintain (保留) our differences?
It sounds convenient that people around the world speak the same language, dress in the same style, eat the same food and play the same games. If the world was like this, you won’t feel strange in any corner of world. But just imagine living in such a strange world. How dull and colorless it would be!
Different kinds of food that people can taste, the colorful and fashionable clothes that we dress in and different languages we speak are all part of the different cultures that our ancestors left us. These differences represent their creativity (創(chuàng)造力) and talent. And we all enjoy different cultures in our daily lives. When you travel to other places, you want to see different things. When you talk to foreigners you expect to listen to interesting stories. These differences in culture are what make life colorful.
But the whole world is shrinking into a small village as globalization (全球化) takes effect and many different cultures are disappearing. In most big cities around the world people wear the same clothes. Fast food stores are everywhere. Hollywood movies are kicking traditional performing arts out of our lives. The colors of our life are disappearing.
There is joke that even the panda and zebra want to live a colorful life. So let’s take action to protect our colorful culture before it becomes as simple as black and white.
It’s not difficult. Learning some folk songs, trying on a traditional clothing and even eating local food instead of going to KFC can help. And we’re sure you will enjoy it.
【小題1】The passage is written to _______.
A.explain cultural differences | B.convince readers to maintain cultural differences |
C.predict the future of globalization | D.show some cultural phenomena(現(xiàn)象) |
A.make the world colorful | B.make communication difficult |
C.only exist in food and clothing | D.will never fade away |
A.mentioning certain cultural phenomena |
B.mentioning his view at the very beginning |
C.mentioning the opposite view at the very beginning |
D.giving examples of cultural differences |
A.expand | B.disappear | C.become smaller | D.grow in number |
A.food | B.clothing | C.language | D.a(chǎn)rchitecture |
查看答案和解析>>
科目:初中英語 來源:2012-2013學(xué)年浙江省建德市九年級上學(xué)期期末考試英語試卷(解析版) 題型:閱讀理解
We all enjoy the beautiful show of colours as leaves change each autumn. But did you ever wonder how and why this happens?
Leaves are nature’s food factories. Plants take water from the ground through their roots and take carbon dioxide (二氧化碳) from the air. Plants use sunlight to turn water and carbon dioxide into glucose (葡萄糖). Glucose is a kind of sugar, which plants use as food for energy and growing.
The way plants turn water and carbon dioxide into sugar is called photosynthesis that means “ putting together with light”. A chemical called chlorophyll helps photosynthesis. It gives plants their green colour. As summer ends and autumn comes, the days get shorter and shorter, and trees “know” to begin getting ready for winter.
During winter, there is not enough light or water for photosynthesis. Trees rest during this time and live on the food they store during the summer. They begin to shut down their food-making factories.
As the green chlorophyll disappears from the leaves, we begin to see yellow and orange leaves. Small amounts of these colours have been in the leaves all along. We just can’t see them in the summer, because they are covered up by the green chlorophyll.
The bright reds and purples we see in leaves are made mostly in autumn. In some trees, like maples (楓樹), glucose is caught in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn turn this glucose into a red colour. The brown colour of trees like oaks (橡樹) is made from waste left in the leaves.
It is the mixture of all these things that makes the beautiful colours we enjoy during autumn.
1.The word “chlorophyll” in the third paragraph means _______ in Chinese.
A.葉綠素 B.氧氣 C.胡蘿卜素 D.蛋白質(zhì)
2.The leaves of the trees in autumn turn yellow because of the short of _____.
A.water and carbon dioxide
B.glucose and energy
C.sunlight and water
D.sunlight and carbon dioxide
3.The way that _______________________ is called Photosynthesis .
A.plants change water and carbon dioxide into sugar
B.plants turn water and carbon dioxide into sugar with the help of sunlight
C.plants use glucose as food for energy and growing
D.chlorophyll is a great help
4.Which of the following is NOT true?
A.When autumn and winter come, the days get shorter and shorter.
B.During winter trees rest and live on the food they store during the summer.
C.During winter small amounts of yellow and orange colours are kept in the leaves all the time.
D.Trees begin to stop making food in summer.
5.This passage tells us __________________.
A.a(chǎn)ll the plants can grow well with the strong sunlight
B.there are all kinds of plants on the earth
C.a(chǎn)ll the colours of the leaves aren’t made from chlorophyll
D.maples and oaks have the same reason as other trees for the change of colours
查看答案和解析>>
科目:初中英語 來源:2014屆江蘇省蘇州市七年級10月月考英語卷 題型:完型填空
Hello, I'm Tom. I'm a middle school student. It's nice to meet you here. First, let me tell you _ 16 about my family. There are five people in my 17 . They are my mother, my father, my sister, my brother and I.
My father is a worker. My mother is an English teacher. My sister is eighteen and my brother is sixteen. I'm fourteen. We 18 go to the same school. We all enjoy _19 football games.
My_ 20 is in West Street. There is a big tree and some small trees around my house. The big one is a pear tree and the small ones are apple _ 21 . 22 there 23 any pears or apples on them now. 24 _ a photo of my house. In the photo, you can see three cats in my house. They are all black and white. We_ 25 them very much.
1.A. anything B. something C. thing D. anyone
2.A school B. house C. room D. family
3.A. two B. five C. three D. six
4.A. seeing B. looking at C. watching D. looking
5.A. bed B. school C. room D. home
6.A. trees B. rivers C. houses D. schools
7.A. But B. And C. So D. Or
8.A. isn't B. is C. are D. aren't
9.A. He's B. Here's C. It's D. There are
10.A. are liking B. likes C. like D. is liking
查看答案和解析>>
科目:初中英語 來源:2013屆重慶市初二下學(xué)期第一次月考英語試卷 題型:閱讀理解
Sometimes we feel good, such as when we get good grades or when something good happens. Sometimes we feel bad, such as when we argue(爭吵) with our classmates or when the teachers criticize(批評)us. Both kinds of feelings are normal(普通的). Of course, we all enjoy good feelings, but when we feel unhappy, sometimes we don’t know what to do about it. Here is a plan that will help you when your feelings are bothering you.
1. ACCEPT your feelings. Say to yourself, "I am sad." "I am scared." "I am angry." "I am embarrassed(尷尬)." It’s all right to have these feelings.
2. RELAX and have a rest before you act. Take slow deep breaths (呼吸)and relax your body. Imagine that you are in a safe place. You could listen to some music or sing a beautiful song!
3. THINK about ways to help yourself. Thinking helps you do something smart instead of hurting yourself or making things worse.
4. DO something to help yourself. Maybe you can talk to someone, or do something you enjoy. If it doesn’t work, go back to step 3.
1.If you want to relax yourself, you can _________.
A.say to yourself, "I am sad." |
B.listen to some music or sing a beautiful song |
C.think about ways to help yourself |
D.watch thrillers |
2.If you are feeling bad, you can say to yourself that _____.
A."I don’t want the bad feeling." |
B."I want to be happy." |
C."It’s too bad to have bad feeling." |
D."It’s nothing to have all these bad feelings." |
3.If you can’t talk to someone, or do anything you enjoy, you can ________.
A.a(chǎn)ccept your feelings |
B.relax and have a rest before you act |
C.think about ways to help yourself |
D.do nothing |
4.The passage tells us ________.
A.what we can do when we feel happy |
B.we can do nothing when we feel bad |
C.We all enjoy good feelings, but bad feeling is unusual to us |
D.what we can do when we feel unhappy |
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權(quán)舉報專區(qū)
違法和不良信息舉報電話:027-86699610 舉報郵箱:58377363@163.com