Air is an odorless (無氣味的), invisible (看不見的) gas that surrounds the earth. It is everywhere on the planet. An “empty” drinking glass and an “empty” room, to give two examples, are not really empty. Each is filled with air. When the glass is filled with water, the water pushes the air out of the glass.

Air, as a gas, has no definite (明確的) shape, but, because it is matter, it takes up space. It is easy to prove that air is something that takes up space. Stuff a dry handkerchief into the bottom(底部) of a glass so that it will not fall out when the glass is turned upside-down. Push the upside-down glass; hold it straight into a jar of water till the glass is completely covered. When the glass is taken out of water, the handkerchief will be dry. The air inside the glass takes up space and keeps the water from coming in.

1.What does the underlined word “Stuff” (in Paragraph 2) mean?

A. Press tightly. B. Take out.

C. Put down. D. Turn fully.

2.The writer tells us that _______.

A. the experiment is done in the laboratory

B. the experiment is done outside the room

C. the experiment is easily done

D. the experiment is carried out indoors

3.Which of the following pictures gives us the correct result?

(W—water; A—air; H—handkerchief)

A. B.

C. D.

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語 來源:山西省校2016-2017學(xué)年高二6月月考(月考八)英語試卷 題型:七選五

When trying to learn some skills of doing homework, you need help from parents or other grown-ups. 1. Someday, you’ll be older and you’ll need to do things without their help.

As you grow up, you will be responsible for more and more of the work yourself. If you pay attention to how your parents or teachers help with your homework, you’ll be able to do it by yourself when the time comes. And that time is soon. Good grades aren’t the only benefit.2..

Sometimes students take too long to get started, put off the homework, or have trouble focusing. 3. Sometimes they don’t think they can do it well. You need help from teachers and parents for this. It’s normal to be worried about what will happen if you fail, but try to trust yourself and give it your best.

4. Tell parents or teachers what the problem is. Some kids have problems with attention, which can make it tougher to organize, focus and get it done. But they, too, can and should use this 1-2-3 method to get better at completing tasks.

Help from grown-ups can be a little boost (提升)that helps you get ready to do it on your own. Who knows? 5. Many grown-ups struggle with doing complicated tasks like how to plan a whole week’s dinners. If your parent is faced with such tough tasks, you know what advice to give:1. Get organized. 2. Stay focused. 3. Get it done.

A.You might even be able to help your parents.

B.In fact, their help will do you harm instead of good.

C.Perhaps they wait for adults to tell them what to do.

D.If you’re struggling, don’t be afraid to keep asking for help.

E.But remember that it’s not good for them to do the work for you.

F.That is because they don’t understand what they’re supposed to be doing.

G.The more tasks you can do well on your own, the better you’ll feel about yourself.

查看答案和解析>>

科目:高中英語 來源:廣東省廣州市三校2016-2017學(xué)年高一下學(xué)期期中聯(lián)考英語試卷 題型:閱讀理解

Fifty years ago, the well-loved musician Bob Dylan played at the Newport Folk Festival and was widely booed (噓聲). The audience may have been unhappy but Dylan's performance helped change the direction of music and culture in the United States.

The mid-1960s were a time of great change. One such place of change was the world of folk music. Bob Dylan became a symbol of change when he moved from acoustic (原聲的) to electric guitar.

Rock music historian Elijah Wald has written a new book about the change. It is called " Dylan Goes Electric. " “There was a moment in the early 1960s when you could look at the Billboard charts and seven of the top 10 albums were folk records. And Joan Baez, Peter Paul and Mary, the Kingston Trio, all had huge, huge, huge number-one records. "

And then this happened: The "British Invasion" introduced the world to the Beatles and grew a huge fan base for rock music. That worried many folk musicians, says Elijah Wald. They hoped that Bob Dylan would come to the rescue. However, a new Dylan sound came from the stage.

Bob Dylan had gone electric, and the followers of folk music were not pleased. "When Dylan went electric, I think one of the issues was the feeling that - wait a minute, he's gone over to the enemy. "

Folk lovers had looked to Bob Dylan to save their movement from rock and roll. But, author Wald says Dylan felt differently about the music. " Dylan had always liked rock and roll and Dylan didn't think of rock and roll as stupid music. "

In fact, Dylan was a Beatles fan. He later said that from the first time he heard the Beatles he

knew "they were pointing to the direction where music had to go. "

Beyond the music, Dylan's performance that night also marked a turn in American culture.

1.How did the audience feel when Dylan played at the Newport Folk Festival?

A. Excited. B. Unsatisfied.

C. Respectful. D. Bored.

2.Which is TRUE about American music world in the early 1960s according to Elijah Wald?

A. Great changes had taken place in folk music.

B. People had grown sincere love for rock music.

C. Folk music was once a huge mainstream pop trend.

D. Bob Dylan was the best American musician at that time.

3.What did folk musicians and followers expect Dylan to do?

A. Change folk music for better.

B. Recover the glory of folk music.

C. Introduce the world to the Beatles.

D. Play rock and roll against the Beatles.

4.What will the author most probably talk about next?

A. Dylan's deep love for the Beatles' rock and roll music.

B. Dylan's beliefs in the new direction music should go.

C. Dylan's music as a great contribution to American folk music.

D. Dylan's performance as a mark of a change in American culture.

查看答案和解析>>

科目:高中英語 來源:河北省2017屆高三下學(xué)期二模考試英語試卷 題型:閱讀理解

Best Companies

Shine United (Madison, Wisconsin)

In the past five years, this Wisconsin-based advertising agency has shared more than $500,000 in profits with its employees through the company's ShineShares program. The agency partnered with the University of Wisconsin's oncology department to develop the Ride, a biking event that benefits cancer research. Employees also get snacks every day, "Beer Thirty" on Thursdays, and Summer Fridays, a program that lets employees leave at noon.

GroundFloor Media (Denver, Colorado)

The key for workers at this midsize public relations firm in Denver is that employees work anytime, anywhere. Headquarters are in a former warehouse downtown, near Coors Field. The offices are spread around the central space that doubles as a wet bar every Thursday when the company's "bear club" brings in a new brew.

Ergodyne (St.Paul, Minnesota)

The St.Paul-based company has grown to operating out of a retired storehouse with plenty of natural light. Rules about dressing? "Wear something." Its purpose? To create cool, comfortable, and tough safety workwear for those who need it to get the job done. Ergodyne has around 50 employees, who enjoy hot dish cook-offs, tickets to sporting events, and at least one happy hour every quarter.

Southwest Michigan First (Kalamazoo, Michigan)

It's family first at this Michigan economic development advising agency. CEO Ron Kitchens says that in the past year, the company has made a push to go green, initially started by the millennial employees who make up half the agency's workforce. A new staff position was created for the purpose of making sure every employee is able to balance working and cheering at their kids' sporting events or going fishing.

1.What's the purpose of the ShineShares program?

A. To raise money for a research.

B. To let employees leave earlier.

C. To share the company's benefits.

D. To partner with a local university.

2.What does Southwest Michigan First encourage their employees to do?

A. To accompany their families.

B. To create new staff positions.

C. To join in cooking competitions.

D. To enjoy themselves in sporting events.

3.Which company allows its staff a flexible working time?

A. Shine United.

B. GroundFloor Media.

C. Southwest Michigan First.

D. Ergodyne.

4.What can we know about the companies mentioned in the text?

A. They offer employees financial support.

B. They care about employees' happiness.

C. They have strict rules about dressing.

D. They have training programs.

查看答案和解析>>

科目:高中英語 來源:浙江省金華市2016-2017學(xué)年高二6月月考英語試卷 題型:閱讀理解

A recent documentary produced by the British Broadcasting Corporation has caused a stir in China and in the UK.

The documentary, titled Are Our Kids Tough Enough? Chinese School revolves (以……為主題) around five Chinese teachers who are sent to teach 50 UK teens at a school in Hampshire.

The teachers instruct the students for a month. The pupils are then tested, and the results are compared to the ones of those who have continued in the regular UK education system. The idea is to see if the Chinese method improves academic performance.

The Chinese teachers use their own teaching methods but receive strong resistance from the students. A clip from the documentary online shows some problems, with Chinese teachers calling their students lazy and lacking in discipline(紀(jì)律), while the students say the high pressure and harsh teachers are driving them crazy.

This has aroused a new debate in both China and the UK, with some arguing the teenagers need more regulation and discipline. Others say Chinese methods encourage note learning instead of independent thinking. For instance, Chinese language teachers should do more than pass on knowledge about words and characters. They should inspire students, helping them feel the sentiment from Chinese literature. This is a higher level of teaching.

Yang Dongping, dean of the 21st Century Education Research Institute, says, “The Chinese teaching methods are designed to strictly train the majority. Foreign teaching methods, however, are more natural and relaxing, and designed to inspire students' interest in learning. Education methods are based on culture. That is why a successful education method in one place may not work that well when simply 'transplanted' into another place.”

Yang Dongping says, “The documentary does reflect some problems rooted in traditional Chinese teaching methods. Nobel Prize winner, Yang Zhenning, gave a very fair comment on this issue. He said the Chinese-style education method works for most ordinary qualified students effectively, helping them reach high standards. However, it may compromise the training for high-potential outstanding students.”

1.What is the purpose of 50 UK teens' being instructed by five Chinese teachers?

A. To test the effectiveness of Chinese teaching method.

B. To help the school improve their teaching efficiency.

C. To do some practical research into the UK education system.

D. To test the intelligence of the UK teens.

2.What's the meaning of the underlined work "harsh" in the fourth paragraph?

A. Very attractive. B. Quite friendly.

C. Rather cold. D. Extremely strict.

3.According to the report, Chinese teaching methods should focus more on ________.

A. passing on knowledge B. encouraging independent thinking

C. regulation and discipline D. training the majority strictly

4.Yang Zhenning's comment implies that traditional Chinese teaching methods are ________.

A. good for Chinese students of all levels

B. helpful to students of high standards

C. good for most ordinary qualified students

D. helpful to high-potential outstanding students

查看答案和解析>>

科目:高中英語 來源:江蘇省高中英語必修五牛津譯林版練習(xí)題:Unit 2 The environment 題型:閱讀理解

Looking at China's history over the past 60 years,it is apparent that,despite much suffering,the country has achieved huge political,economic and social success,especially during the past three decades.

The press center for the celebration of the 60th founding anniversary of new China was officially opened on the morning of September 22. Zha Shouchen,deputy director of the press center introduced that,during the National Day,there would be 3,200 domestic reporters,and more than 1,300 foreign journalists to come to Beijing to make the covering work.

The press center provided many services for domestic and foreign reporters,such as issuing the press cards to reporters,accepting the interview application,organizing press conferences and activities of group interviews,providing the means of communication and information services for reporters.And the following was the scene.

A grand parade in Beijing on Oct.1,led by the People's Liberation Army and the People's Armed Police Force,showed some of China's latest achievements in defense modernization.About 8,000 military officers,along with tanks and other vehicles,formed a straight line stretching 3 kms.

The military parade was followed by a civilian parade featuring six massive performing groups and 36 formations of about 100,000 people.In addition,60 floats(彩車)represented everything from the country's geographic areas to the previous year's Beijing Olympics.

Everyday life in China is a parade on a grand scale,with citizens now being able to enjoy things their ancestors did not dare to contemplate 100 years ago,things their grandparents took for luxury 60 years ago,and things their parents did not even know how to attempt 30 years ago.

1.Of the following achievements,which one is NOT listed in Paragraph 1?

A. Politics. B. Economy.

C. Education. D. Society.

2.Which of the following led the parade according to Paragraph 4?

A. The People's Liberation Army.

B. The People's Liberation Army and the People's Armed Police Force.

C. The People's Police Force and the People's Army.

D. The People's Armed Police Force.

3.Which of the following statements is NOT true according to the text?

A. The civilian parade is after the military parade.

B. There are 60 floats representing everything from the country's geographic areas.

C. Everyday life in China is a parade on a grand scale.

D. The parade on Oct.1 showed some of China's latest achievements in automotive modernization,such as tanks and other vehicles.

4.What's the subject discussed in the text?

A. The celebration of 60th anniversary of the founding of New China.

B. The grand parade in the ceremony.

C. The defense modernization in China.

D. The economic development during recent years.

查看答案和解析>>

科目:高中英語 來源:江蘇省高中英語必修五牛津譯林版練習(xí)題:Unit 2 The environment 題型:單項(xiàng)填空

—You should have prepared your speech for the meeting,Mrs Smith.

—Yes,I know.But how could I________the meeting date fixed so soon?

A. while B. as

C. after D. with

查看答案和解析>>

科目:高中英語 來源:江蘇省高中英語選修六牛津譯林版練習(xí)題:Unit 2 What is happiness to you? 題型:單項(xiàng)填空

Fred is second to none in math in our class,but ______,he hardly passed the final math exam.

A. as a matter of fact B. as usual

C. right away D. believe it or not

查看答案和解析>>

科目:高中英語 來源:河南省鄭州市2016-2017學(xué)年高二下學(xué)期入學(xué)測(cè)試英語試卷 題型:短文改錯(cuò)

假如英語課上老師要求同桌之間交換修改作文,請(qǐng)你修改你同桌寫的以下作文。文中共有10處語言錯(cuò)誤,每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。

增加:在缺詞處加一個(gè)漏字符號(hào)(∧),并在其下面寫出該加的詞。

刪除:把多余的詞用斜線(\)劃掉。

修改:在錯(cuò)的詞下劃一橫線,并在該詞下面寫出修改后的詞。

注意:1.每處錯(cuò)誤及其修改均僅限一詞;

2.只允許修改10處,多者(從第11處起)不計(jì)分。

Dear Sophie,

I am glad you will have the chance to get close look at my country.

You were more than welcome to stay in my home during your visit Beijing.Now that you have two weeks here,that will be a good idea to take several activities through them you can get a taste of the local culture.Pay a visit to some famous cultural relics such as the Great Wall,the Forbidden City or the Summer Place will help you picture our country with a long history.In addition to,you may be interesting in having a look at our school and taking part in a Chinese Story Telling Competition.It,of course,will be beneficially to your understanding of Chinese language.

Yours sincerely,

Zhang Li

查看答案和解析>>

同步練習(xí)冊(cè)答案