When was the last time you relied on an old-fashioned map to figure out the route to an unfamiliar place? For many, the GPS has revolutionized navigation, making a paper map almost obsolete? So how has this piece of technology developed over its 26 years of existence? On February 14,1989,the first satellite in the US Global Positioning System was sent into space from Cape Canaveral, beginning the start of one of the wonders of the modern world.

GPS stands for Global Positioning System, which is made of a network of around 30 satellites that move around the earth. The system uses a process called trilateration to find out one’s position. By measuring the time it takes for the signal to reach one satellite, the GPS can determine your distance from the satellite, creating a sphere(范圍) of possible locations. Measuring your distance from at least three satellites will narrow your location to the place where the three spheres cross one another, to the accuracy(精確) of about less than 1 meter!

The GPS was first invented during the Cold War by the United States Department of Defense. In 1960, the first system, which was made of just five satellites, was put into place. It was initially created for strictly military(軍事的) use; however, in 1983, as a result of faulty navigation technology, a Korean passenger plane mistakenly flew into USSR territory(蘇聯(lián)領(lǐng)土) and was shot down. In order to prevent such bad events, American President Ronald Reagan allowed civilian(民用的) use of the GPS.

Over the next ten years, the system’s accuracy improved as the network was increased to 24 satellites. And during the first Persian Gulf War, the new GPS was finally used by the military. Now scientists use the technology to track animals to better understand their movement and behavior. Parents who may be worried about their children can also use GPS technology to track them.

1.The underlined word “obsolete” in Paragraph 1 can best be replaced by “ ”.

A. priceless B. unusual

C. perfect D. useless

2.The second paragraph is mainly about .

A. how the GPS works B. the history of the GPS

C. the applications of the GPS D. some problems with the GPS

3.According to the text, the GPS .

A. has a history of over 100 years

B. became popular during the Cold War

C. relies on the satellites circling the earth

D. was available first during space exploration

4.What does the author think of the GPS?

A. It is not always reliable

B. It has a lot of uses in many fields

C. It makes our life more peaceful

D. It will soon go out of fashion

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語 來源:2.1 Unit 2 Warming Up Reading 題型:完成句子

完成句子

1. Everyone was waiting for the good result but the subject of salaries (工資) didn’t ________________(come).

2. The whereabouts(行蹤) of Kim Jong-un, the highest leader of North Korea, are still unknown __________________ (present).

3. The daily news time that most of us enjoyed had to be canceled _________________(because) the inflexible(死板的) rules.

4. Good learners will ______________________(use) every possible chance they have to speak English.

5. Cartoon characters _____________________(such) Mickey Mouse and Snoopy are still popular to this day.

查看答案和解析>>

科目:高中英語 來源:2017屆高三普通高等學(xué)校招生全國統(tǒng)一考試(新課標(biāo)Ⅰ)猜題卷(一)英語試卷 題型:完形填空

I will never forget the experience of seeing a part of Canada and snowboarding in the mountains.

I got a little emotional on the _______from Montreal to our first stop in Vancouver. Although I have to _______that I watched a movie while we flew over the prairies(大草原), I did occasionally _______out of the window to see what was what ! _______most of the mountains in Alberta and B.C.were covered in clouds so I had to_______our drive from Kelowna to Revelstoke to see those monsters!

I _______ I'd entered into Lord of the Rings territory(領(lǐng)地) as we took a lift to get to the top of Mt. Mackenzie in Revelstoke.

Before snowboarding I learned not to_________coffee in the morning, which only added shaking to my_______during the first few descents(滑雪下坡) of the day. Snowboarding in powder is quite_________from riding the icy-slopes(斜坡) in Quebec. At least when you ____________down several metres, it's like falling on pillows! My main __________, however, was getting stuck in the few __________sections of the mountain, though a few____________skiers gave me a ride by letting me grab their ski poles and ____________me to the next drop.

Even though we could____________really ski the top half of the mountain, it was still at least twice the size of the mountain we usually____________! Our phone pictures don't do justice to these mountains, ____________we have our own __________. When my husband and I asked each other what was our favourite__________of the trip, other than spending time with each other, it was____________the view.

1.A. train B. ship C. plane D. car

2.A. admit B. pretend C. recall D. regret

3.A. go B. look C. walk D. stare

4.A. Luckily B. Particularly C. Possibly D. Unfortunately

5.A. end with B. pick up C. wait for D. start from

6.A. felt B. dreamt C. imagined D. agreed

7.A. sell B. drink C. cook D. store

8.A. nervousness B. confidence C. excitement D. delight

9.A. absent B. tired C. safe D. different

10.A. fall B. slip C. skate D. look

11.A. task B. issue C. concern D. idea

12.A. downhill B. rough C. steep D. flat

13.A. helpful B. young C. aged D. single

14.A. throwing B. dragging C. lifting D. deserting

15.A. even B. just C. only D. yet

16.A. stay B. visit C. climb D. ski

17.A. and B. so C. for D. but

18.A. memories B. advantages C. feelings D. tips

19.A. mountain B. part C. place D. friends

20.A. hardly B. normally C. certainly D. strangely

查看答案和解析>>

科目:高中英語 來源:2017-2018學(xué)年高一英語人教版必修1(Unit 1 Friendship) 題型:語法填空

閱讀下面短文,在空白處填入 1個(gè)適當(dāng)?shù)膯卧~或括號(hào)內(nèi)單詞的正確形式。

Once there was a rich man in a village, but he never gave anything to help others. Nobody liked him in the village. One day he said to them, "I know you don’t like me. When I die, I 1 (give) everything to you. Then everyone will be happy."

Even then nobody believed him. The rich man couldn’t understand 2 they didn’t believe him. One day he went for a walk. 3 a tree he happened to hear a pig and a cow 4 (talk).

The pig said to the cow, "Everybody likes you but 5 likes me. Why? When I die, I will provide people 6 meat, ham and so on. I will give three or four things to 7 . But you give only one thing — milk. Why do people like you all the time 8 not me?"

The cow answered, "Look, I give them milk while I’m alive. They see that I am generous with what I have. But you don’t give them anything while you’re alive. Only after you’re dead 9 you give them meat, ham and so on. People don’t believe in the future. They believe in the present."

From then on, the rich did all his best to help 10 poor. Everyone began to like him. And he felt quite happy.

查看答案和解析>>

科目:高中英語 來源:遼寧省沈陽市2016-2017學(xué)年高一下學(xué)期期末聯(lián)考英語試卷 題型:書面表達(dá)

以下是一則來自某英語報(bào)紙的新聞報(bào)道,請(qǐng)你結(jié)合新聞內(nèi)容和提示要點(diǎn)寫一篇英語短文。

November 24,2001 Thursday

Wild animals play an important role in our environment. However, many human activities have put them in serious danger of extinction. By the year 2025, one fifth of the world’s animal species may be extinct.

提示要點(diǎn):1.描述動(dòng)物的現(xiàn)狀;

2.應(yīng)該采取的措施;

3.談?wù)勛约旱目捶ā?/p>

注意:1.詞數(shù)100左右;

2.可適當(dāng)增加細(xì)節(jié),以使行文連貫。

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

______________________________________________________________________

查看答案和解析>>

科目:高中英語 來源:江蘇省宿遷市2016-2017學(xué)年高二下學(xué)期期末考試英語試卷 題型:任務(wù)型閱讀

Music is a Universal Language

“Music is the universal language of mankind.” – Henry Longfellow

Everyone has the inborn ability to understand and enjoy music. There are many theories as to why this is, but it has become a part of human beings. Since the beginning, humans have expressed themselves through music. Simple tribal rhythms evolved into many types of more complex music, including classical, rock, jazz, and R&B. While the styles between these many types of music may vary, everyone is able to understand and relate to them.

What are the essential parts of a language? Every language uses vocabulary, or a set of words, to create sentences that convey messages. The tone and style of the sentences convey different feelings or emotions. Music is exactly the same way. Twelve tones, or notes, are combined to create phrases that also convey emotion. Music can even be written, like most other languages. Conversations even take place in music. Two saxophonists can play melodies back and forth, expressing different styles and feelings, building off of each other, responding to each other. Music changes over the years like other languages. Most people who speak fluent English cannot read one of Shakespeare’s plays because the language has changed so much. Music is also affected by time, and over a long period, many new types of music and instruments have emerged to create different sounds and convey different messages. There are so many similarities between vocal language and music that they must be same.

I recently had a chance to experience conversation through music. In 2008, I traveled to Manila, Philippines to participate in a high school jazz exchange where many students from all over Asia came together to share their talents. Everyone was mixed into different small groups to prepare for a concert at the end of week. Few people spoke fluent English so vocal communication was very tough. However, it wasn’t needed. Everyone seemed to understand each other simply through the music and there were few times where direct translation was needed. At the performance, every group played for a live audience. They all sounded phenomenal and it felt like they were in perfect time and harmony. During my group’s performance, I was able to improvise with a Korean boy who spoke very little English. But we managed to have a conversation through our instruments, building off each other’s riffs until we were creating our own melody on the fly. It was a great experience.

Because of the many similarities that music shares with other languages, it is a very effective way to communicate with others. Music brings us together, connects us with other people, and allows us to express ourselves in ways that are different from speech and writing. It has the ability to convey emotions and messages to the core of people, which is why Henry Longfellow is absolutely correct when he states that “music is the universal language of mankind.”

Music is a Universal Language

Introduction

● Human beings have the ability to appreciate music since they were

1..

● Despite the different types2. from simple tribal rhythms, everyone is able to understand music.

3. between language and music

● The tone and style of the sentences convey different feelings or emotions, 4. does music.

● Like most other languages, music even has its 5. forms.

● Both language and music have gone 6. many changes over the years.

● Conversations even take place in music.

● Time also has a great 7. on music. New forms of music and instruments come up to convey different messages.

My chance of 8. conversation through music

I participated in a high school jazz exchange in Philippines in 2008, where students came from all over Asia. While there were language 9. between us, we still managed to communicate well by music.

Conclusion

Music is a very effective way to communicate with others. Just as Henry Longfellow 10. it, “music is the universal language of mankind.”

查看答案和解析>>

科目:高中英語 來源:江蘇省宿遷市2016-2017學(xué)年高二下學(xué)期期末考試英語試卷 題型:單項(xiàng)填空

—Does my son listen to the teacher attentively in class?

—Rarely, believe it or not, ________ him behave well in class.

A. did I see B. I saw

C. I have seen D. have I seen

查看答案和解析>>

科目:高中英語 來源:1.3 Unit 1 Using Language 題型:七選五

七選五

根據(jù)短文內(nèi)容,從短文后的七個(gè)選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

Traditional Chinese Culture

Chinese culture is over 5000 years old. 1

The spirit of the tea ceremony

Xi Hu Long Jing (West Lake Dragon Well) and Yunnan Pu’er have long been world famous. 2 The spirit of the Chinese tea ceremony captures the Chinese attitude towards life and spirituality. These are the things that people all over the world can benefit from.

A handful of good tea leaves with some boiling water and a set of lovely tea ware is the perfect way to spend a sunny afternoon and gain some insight into the wisdom of this ancient civilization.

3

During the 5,000 years of Chinese civilization, many different flavors, styles, and cuisines(烹飪)have developed based on traditional philosophy and culture. This ancient food culture has had a direct impact on the countries, such as Japan, Mongolia, South Korea, Thailand, and Singapore. It has benefited billions of people around the world through such innovations as Chinese vegetarian culture, tea culture, vinegar, pasta medicated diets, ceramic tableware, and the use of soybeans in the diet.

Confucianism has flourished during the last 2,500 of China’s 5,000-year history. 4 This school of thought has had the most profound and long lasting influence in China’s history. Seventy-four Nobel Prize winners and many other highly respected scholars have stated that for the benefit of mankind’s livelihood and development into the next century, these teachings should be promoted and adopted worldwide. 5

A. Chinese cuisine

B. Traditional Chinese culture

C. It has been the mainstay of this ancient civilization.

D. They are pretty popular due to their superior color and flavor.

E. The following three items of traditional Chinese culture have had a worldwide impact.

F. This wonderfully rich food culture has also had an impact on Europe, America and Oceania.

G. This would provide long lasting benefits for man, helping to ensure a peaceful and happy life.

查看答案和解析>>

科目:高中英語 來源:1.1 Unit 1 Warming Up Reading 題型:單項(xiàng)填空

After the stranger left, suspicion(猜疑)________ among the villagers.

A.rose B.a(chǎn)rose C.raised D.lifted

查看答案和解析>>

同步練習(xí)冊(cè)答案