【題目】 Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction. Friction happens when two things that aren't very smooth rub together to make heat energy. The faster you rub two things together, the more friction (and heat) you can make. Let's discover friction!

WHAT YOU'LL NEED:

● Soap ● Water ● Your hands!

WHAT TO DO:

①M(fèi)ake sure your hands are dirty.

②Rub your hands together until you feel the heat of your hands.

③Now, use soap and water to get your hands very slippery(滑的).

④Try to make friction happen while your hands are slippery.

⑤Please write down what has happened.

LET'S TALK!

Friction is an energy that happens when two things tub together. When friction happens, it makes heat! When your hands are slippery, they won't make very much friction and your hands won't get so hot.

DID YOU KNOW?

● Friction happens when you stop your fast running bike.

● Ancient people made fires by rubbing two pieces of wood together. Friction happened though they didn't know it.

Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not hot, touch the tires(輪胎) of the car before and after a short drive to see how much warmer they get from friction.

【1】This text is most probably .

A.a science reportB.a car advertisement

C.a rubbing introductionD.a chemistry programme

【2】You'd better make your hands to get heat when you rub them.

A.slipperyB.dryC.wetD.smooth

【3】What does the word "friction" in this text mean in Chinese?

A.摩擦B.冷卻C.膨脹D.震動

【4】 is not an example of friction.

A.Bike ridingB.Car driving

C.Hands rubbingD.Friction discovering

【5】What's the last column(欄目)?

A.THINK IT OVER!B.WHAT HAPPENED?

C.EVERYDAY ACTIOND.WORK WITH PARENTS

【答案】

【1】A

【2】B

【3】A

【4】D

【5】D

【解析】

本文主要介紹有關(guān)摩擦的一些知識。摩擦是無處不在的。只不過看你是否注意到了它。

【1】推理判斷題。根據(jù)“Let's discover friction!”可知，我們要探索摩擦，因此本文可能是一篇科學(xué)報(bào)道，故選A。

【2】細(xì)節(jié)理解題。根據(jù)“①Make sure your hands are dirty.②Rub your hands together until you feel the heat of your hands.”可知，在摩擦雙手之前，先把手弄干，故選B。

【3】詞義猜測題。根據(jù)“Friction happens when two things that aren't very smooth rub together to make heat energy.”可知，當(dāng)兩個(gè)不太光滑的物體摩擦產(chǎn)生熱能，因此這是表示摩擦。故選A。

【4】推理判斷題。根據(jù)“When your hands are slippery, they won't make very much friction and your hands won't get so hot.”可知，摩擦手會產(chǎn)生摩擦力；根據(jù)“Friction happens when you stop your fast running bike.”可知，騎自行車會產(chǎn)生摩擦力；根據(jù)“If it is not hot, touch the tires(輪胎) of the car before and after a short drive to see how much warmer they get from friction.”可知，開汽車會產(chǎn)生摩擦力。因此摩擦的發(fā)現(xiàn)是不會產(chǎn)生摩擦力的。故選D。

【5】推理判斷題。根據(jù)“If not, ask your parents to take you out in a car”, 可推知最后一個(gè)欄目是：和父母合作，故選D。

認(rèn)真閱讀題干，根據(jù)題干要求，在文中尋找答案所在的語句或段落，進(jìn)行分析理解，詞義猜測，推理判斷和概括歸納，選擇正確的答案。例如小題2，根據(jù)“①Make sure your hands are dirty.②Rub your hands together until you feel the heat of your hands.”可知，在摩擦雙手之前，先把手弄干，故選B。

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：初中英語 來源： 題型：

【題目】根據(jù)下列句子及所給漢語注釋或上下文語境，在答題卷上標(biāo)有題號的橫線上，寫出空缺處各單詞的正確形式。每空只寫一詞。

【1】It was only an hour later that he discovered his _______ (槍)was missing.

【2】It is important to keep _______ (鎮(zhèn)靜的)when you are in danger.

【3】The list of the _______ (獲勝者)will be announced tomorrow.

【4】Her novels are very _______ (高度)praised.

【5】Not only Jack but also his brother _______ (致力于)their energies to writing films.

【6】You are so lazy! This is the _______ (不整潔的)room I have ever seen.

【7】Audrey Hepburn was _______ (誤認(rèn)為) for a real princess.

【8】―She likes reading books and her classmates call her a bookworm.

―Don't _______ at her. She is just hard-working.

【9】―I failed the English exam again.

―Don't worry. You can achieve success _______ your effort.

【10】―What do you think of David?

―He is shy and quiet. He loves sitting in the corner in _______.

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】 How do you feel when your teacher asks you to work on a group project with other students? Do you like to work together with others or work alone?

The Program for International Student Assessment, or PISA, carried out a survey of students' ability to work together in groups. They found that students who do well on tests by themselves are also likely to be better at working with other people.

This finding was true for many countries. Students in Japan, South Korea, Finland and Canada, where test scores are high, also did well in working together to solve problems. But this was not the case for every country. Chinese students, who tend（趨向）to have high scores as well, displayed just average collaborative（合作的）skills.

“One reason might be that Chinese parents and teachers focus too much on grades, ”said Zhao Zhongxin, former vice president of the Chinese Family Education Association.“Students have a lot of exam pressure and they view school as a place for competition.”

“However, collaborative skills are very important for preparing students for today's society, ”he added.“Luckily, more Chinese parents and teachers are realizing the importance of this and are thinking of ways to help students improve this skill.”

Another interesting finding from the PISA survey was that girls tend to be better than boys at working together. They said girls show more positive attitudes toward relationships, which means they are more willing to listen to others' opinions.

PISA also found that the classroom environment tends to influence how well students collaborate. In classes where there are a lot of activities that require communication, such as class debates, students tend to have better attitudes toward collaborating.

【1】Which of the following is NOT one of the survey's findings?

A.Those who do well on tests are also better at working with others.

B.Collaborative skills are more important than scores for students' futures.

C.Girls are better at working with others than boys.

D.The classroom environment can influence students' ability to work in groups.

【2】What can teachers do to improve their students' ability to work with others?

A.Give students high scores on every test.B.Help students to get used to exam pressure.

C.Make girls work with girls instead of boys.D.Arrange more communicative activities in class.

【3】What's the passage mainly about?

A.How to improve collaborative skills.

B.Who tend to cooperate in working.

C.The result of a survey on students' collaborative ability.

D.The process of a survey on students' collaborative ability.

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】—These days, it's common for teachers to give homework on apps.

—_____________________________.

A.Take it easy.B.Never mind.

C.I couldn't agree with you.D.What a pity.

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】假如你是Daniel，是九年級某班的學(xué)生。對于上個(gè)月聞名世界的巴黎圣母院（Notre Dame Cathedral）大火表示痛心，對于失去-件藝術(shù)瑰寶表示惋惜，同時(shí)你想提醒人們從這-事件中吸取教訓(xùn)。請以“Art Treasures Without Boundary”為題，根據(jù)下列表格的提示，用英語寫-篇文章。

內(nèi)容要點(diǎn)包括：

簡介

巴黎圣母院位于法國巴黎市中心，建立于12世紀(jì)，有著800多年的歷史，每年吸引了數(shù)百萬的游客。

事件

2019年4月15日下午6時(shí)的這場大火讓世人震驚，教堂的塔尖被完全燒毀，在塔尖和屋頂坍塌倒地的那-刻，很多市民在街上傷心落淚。人們再也看不到玫瑰花窗了，這是人類文明的重大損失。

感想

人們應(yīng)該吸取教訓(xùn)，在保護(hù)文物時(shí)，再怎么小心也不為過。

自己的感想（至少兩條）

寫作要求：

1．表達(dá)清楚，信息完整，上下文連貫；

2．詞數(shù)在100詞左右，不得使用真實(shí)姓名和學(xué)校；

3．開頭與結(jié)尾己給出，不計(jì)入總詞數(shù)

提示：塔尖spire 玫瑰花窗the rose window 文物cultural relics

Art Treasures Without Boundary

I first knew Notre Dame Cathedral from the book The Hunchback of Notre-Dame by a French writer Victor Hugo._____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Hopefully, the fine will ring a bell for Chinese society.

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】— In this book, it says it is no use keeping English diaries every day.

—Oh! You shouldn’t believe ______ you read.

A.nothingB.somethingC.everythingD.anything

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】— Why do you put a big mirror(鏡子) in the front of the school?

— Everyone can look for a while at __________ in the mirror before entering the school.

A.heB.himC.hisD.himself

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】— Some people don’t know the value of their health they’ve lost it.

— Doctors suggest that we should take a physical examination every year.

A.untilB.whenC.afterD.as

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】然而，他希望將來在中國在制造高科技產(chǎn)品上也會做得更好，人們在世界各地都能買到這樣的產(chǎn)品。

However, he hopes that in the future China will also get _____ at making high-technology products _____people can buy in all parts of the world.

查看答案和解析>>

同步練習(xí)冊答案