What is colour? Why do some of the things around us look red, some green, others blue?

Colours are really made by reflected (反射) light. We see colour because most of the things reflect light. Something is red, for it reflects most of the red light. In the same way, if something is green, it reflects most of the green light. If something reflects all light, it is white. If it doesn’t reflect any light, it is black.

Some of the light is reflected and some is taken in (吸收) and turned into heat. The darker the colour is, the less light is reflected, the more light is taken in. So dark-coloured clothes are warmer in the sun than light-coloured clothes.

1.When something reflects light, we can _______ .

A. see its colour B. see its heat

C. not see its colour D. see nothing

2.The dark-coloured clothes are warm because _________ is taken in.

A. more light B. less light

C. more colour D. less colour

3.In summer ________ make people feel cool.

A. dark-coloured clothes

B. red-coloured clothes

C. green-coloured clothes

D. light-coloured clothes

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)年福建福安市七年級(jí)上期中考試英語(yǔ)試卷（解析版） 題型：單項(xiàng)填空

— she look like?

—She has small eyes and a wide mouth.

A. what’s B. What does C. What do.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2015-2016學(xué)年江蘇射陽(yáng)外國(guó)語(yǔ)學(xué)校七年級(jí)上第一次月考英語(yǔ)試卷（解析版） 題型：單項(xiàng)填空

I am good at_______ ball games and .

A. playing, swimming B. playing, swiming

C. play, swim D. playing, swim

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2016屆山東日照莒縣北五校九年級(jí)10月聯(lián)考英語(yǔ)試卷（解析版） 題型：單詞拼寫(xiě)

閱讀填空（共10小題，計(jì)10分）

閱讀下面的短文，在空白處填入適當(dāng)?shù)膬?nèi)容或括號(hào)內(nèi)單詞的正確形式（每空不多于三個(gè)單詞）。

E-book is short for electronic (電子的) book. It is usually read on 1. (person) computers. Some mobile phones can also be used to read e-books.

Earlier e-books were written for a specific group of 2. (read) and were about only a few subjects. 3. the development of the internet, knowledge and answers to a lot of questions mainly come from e-books. This is 4. the e-book business is increasing quickly.

E-books have many advantages. First, they save time. We don't need to go to a bookstore to buy books, besides, we can find the topic we want to know about on the Internet, 5. then we can quickly get many e-books on similar topics. 6. (two), e-books save money. Some e-books cost a little money, and there are millions of e-books on the Internet that we can get for free. Third, more trees are saved because e-books don't need to be printed(印刷) on paper. Fourth, e-books make reading 7. (convenient). You can carry a whole library of hundreds of books with you in a small computer or any e-book reader (電子閱讀器) without worrying about their weight.

8. e-books have certain disadvantages. They need a personal computer 9. an e-book reader and the information can be lost if its file format (文件格式) is not supported or changed in the reader's computer. However, e-books provide 10. (we) with a new way of reading. That is good.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2016屆山東高密四中文慧學(xué)校九年級(jí)10月月考英語(yǔ)試卷（解析版） 題型：其他題

閱讀短文，根據(jù)上下文意思，將方框中的句子還原到短文中適當(dāng)位置，使其通順完整，并將其字母代號(hào)寫(xiě)在橫線上。其中有一句是多余選項(xiàng)。

Last summer I had an awful car accident and I had to spend two months in hospital. I hope my sad experience will be a lesson to all drivers, especially those who think it is safe to drink and drive.

__1._ I had a lot of wine with my friends. I thought I could drive home that night, but thirty minutes later, I was losing control of myself, yet I still went on because I really wanted to go to bed. __2.___ The last thing I remember was trying to get out of the car with blood pouring down my head and broken glass all over my body. I remember trying to get out but my legs were stuck and I could hardly move. Luckily, I was wearing a seat belt(安全帶). _3.__ The next thing I remember was lying on a hospital bed. It seemed I only broke my leg.

___4.__ I hope that people both young and old will drive more safely in the future.

A. This is one of the dangers of drinking and driving.

B. Most people say that saved my life.

C. I remember that day I was feeling a bit upset.

D. The car is my favorite one.

E. My car then hit a parked truck on the side of the road.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2016屆江蘇南京江寧區(qū)湖熟片九年級(jí)10月月考英語(yǔ)試卷（解析版） 題型：單詞拼寫(xiě)

根據(jù)短文內(nèi)容和首字母提示，填寫(xiě)所缺單詞。

Mike was reading in the garden when his mother came. She pointed to something and asked Mike w 1. it was. Mike felt quite surprised, but he told her it was a sparrow and got b 2. to reading.

Several minutes later, his mother pointed to the same sparrow and asked the same question again. Mike got a little a 3. but still answered her question. After a little while, his mother did the same thing once more. This time Mike could not c 4. his anger. He shouted at her f 5. disturbing(打擾) him again and again.

The old lady silently took out an old diary, turned to a page and showed it to Mike. Though a little impatient, Mike began to r 6. it.

“Today, I was watering flowers in the garden when little Mike pointed to a bird on the grass and asked what it was. I s 7. at him, said it was a sparrow and kissed him.” After a while Mike asked me again and I did the same. Pointing to the same sparrow, little Mike k 8. asking the same question and I answered and kissed him every time.

Something gently touched Mike’s face. His face turned red with s 9. for being so impatient to his mother.

Your parents have given you many things in their lifetime, but you may not realize that u 10. they are gone.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2015-2016學(xué)年浙江金華六校七年級(jí)10月聯(lián)考英語(yǔ)試卷（解析版） 題型：完形填空

完形填空（本題有10小題，每小題1分，共10分）

閱讀下面短文，掌握大意，然后從每題所給的A、B、C、D四個(gè)選項(xiàng)中選出最佳選項(xiàng)。

Hello, boys and girls. My is Lingling. I am in . This is our .There are 46 and 47 chairs in it. are 22 boys and 24 girls in our class. There are English girls our class. They are Lucy and Lily. are twins (雙胞胎). We are . Miss Chen is our English teacher. is friendly (友好的). We like our class.

1.A. book B. name C. pen D. class

2.A. class 3 B. three class C. Class 3 D. Three Class

3.A. student B. school C. teacher D. classroom

4.A. desks B. cups C. maps D. footballs

5.A. These B. This C. That D. There

6.A. one B. two C. three D. four

7.A. in B. at C. of D. on

8.A. We B. They C. She D. You

9.A. hands B. girls C. friends D. boys

10.A. She B. He C. It D. Miss Chen

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)廣饒縣樂(lè)安中學(xué)八年級(jí)上期中英語(yǔ)試卷（解析版） 題型：其他題

閱讀下面短文，用括號(hào)內(nèi)所給動(dòng)詞的適當(dāng)形式填空 (必要時(shí)可加情態(tài)動(dòng)詞或助動(dòng)詞)。

Tom is a boy of fifteen. His parents 1.______(die) two years ago, and he had to make a living by himself. Now he 2.______(work) as a servant at Mr. Jackson's. He works hard and Mr. Jackson is pleased with him. Mr. Jackson has fun 3.______(plant) all kinds of trees. There are many kinds of precious (珍貴的) trees in his garden. The week before last Mr. Jackson 4._____(bring) a few trees home, planted them in the garden himself and watered them every day. Some days later, he had to 5._____(leave) for another city. Before he started, he said to Tom, "6._____(take) good care of the plants when I am out. Some boys of our neighbors always want 7._____ (steal) them." "8.______(not worry) about them, sir," answered Tom. "I 9._____(try) my best to watch them." Six days passed and Mr. Jackson came back. As soon as he 10. （see）Tom, he asked, "Has anyone come to steal the trees?" "No, sir," said Tom. "I pulled them six days ago. Now they have been hidden (藏起來(lái)) in the house for nearly a week!"

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2015-2016學(xué)年江蘇江陰市八年級(jí)上學(xué)期期中英語(yǔ)試卷（解析版） 題型：單項(xiàng)填空

Do you believe what he _______about his best friend? Yes , he never _______lies.

A. talks; tells B. says; tells

C. talks; says D. says; talks

查看答案和解析>>

同步練習(xí)冊(cè)答案