As free as they make us, mobile phones still need to stay close to a power source. Soon that may change with "green" power.

Three Chilean students got the idea for a plant-powered device(裝置) to charge their cellphones, while sitting in their school's outdoor courtyard during a break from exams, with dead mobile phones. Then, one of them had an "aha" moment.

“It occurred to Camila to say about plants, "said inventor Evelyn Aravena. "Why don't you have a socket, if there are so many plants? 'After that, we thought, why don't they have a charging outlet? Because there are so many plants and living things that have the potential to produce energy, why not? ' "

Their invention — a small biological circuit called E-Kaia - uses the energy plants to produce during photosynthesis(光合作用). A plant uses only a small part of that energy and the rest goes into the soil, and that's where the E-Kaia collects it. The device plugs into the ground and then into your phone.

"It's the most amazing project I've ever seen in my life, plain and simple. They brought this original model, and it worked — and that's when it all changed, at least from my personal point of view and I began to support them. " said Mauricio Cifuentes.

The device solved two problems for the engineering students — they needed an idea for a class project, and an outlet to plug in their phones.

"Looking for a place to charge the notebook, which had no power, and the mobile phones, we weren't able to find anything because all the other students were in the same state of madness trying to find a place to charge their devices," said Aravena.

But plants are everywhere, and the biocircuit makes the best of their excess(過多的) power.

The E-Kaia doesn't carry much charge but it's powerful enough to completely recharge a mobile phone in less than two hours.

The student inventors have applied for patents on their technology, and expect the E-Kaia to go on sale in December 2016.

1.How could the students get the "green" power idea?

A. By carrying out an experiment.

B. Just from an occasional thought.

C. With the support of their professors.

D. Enlightened(啟發(fā)) by the information in a science book.

2.How does the device work?

A. By using the energy during photosynthesis. B. By using a small biological circuit.

C. By using the electricity stored in the device. D. By using a device buried in the ground.

3.What can we learn from what Mauricio Cifuentes said?

A. He intended to buy the patent.

B. The device was made in a rough way.

C. He showed great interest in the device.

D. He attempted to produce the device in large numbers.

4.What might be the best title for the passage?

A. A New Device to Change the World

B. Green Power - A New and Potential Source

C. Chilean Students Find A Green Way to Charge Phones

D. A New Device Invented by Chilean Students Will Be on Sale

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：湖南省邵陽市業(yè)水平模擬考試（五）英語試卷 題型：短文填空

Can trees talk? Yes, not in words. Scientists have reasons to believe that trees do communicate 1. each other.

Not long ago, researchers 2.(learn) some surprising things. First a willow tree 3.(attack) in the woods by caterpillars(毛蟲) changed the chemistry of its leaves and made them taste so terrible that they got tired of the leaves 4.(gradual) and stopped eating them. Then even more 5.(astonish), the tree sent out a special smell—a signal causing 6. neighbors to change the chemistry of their own leaves and make them less tasty.

Communication, of course, doesn’t need to be in words. We can talk to each other by smiling, raiding our shoulders and moving our hands. 7. we know is that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals. 8.(fly) in certain patterns that tell other bees where 9. (find) nectar(花蜜) for honey. So why shouldn’t trees have 10.(way) of sending messages?

查看答案和解析>>

科目：高中英語 來源：湖北省荊門市2016-2017學(xué)年高二下學(xué)期期末質(zhì)量檢測英語試卷 題型：完形填空

I’ve always had strong opinions of how love should be expressed, but others have their own ways of showing care.

What I ______ most about visiting my boyfriend’s parents is the loud tick of the clock in the dining room as we ______ ate our meal．With so little conversation I was quick to regard his family as ____．When we got into the car to go home, his father suddenly appeared．_____, he began to wash his son’s windscreen．I could feel he is a ____man through the glass.

I learned another lesson about ______a few years later．My father often ____ me early in the morning．“Buy Xerox．It’s a good sharp price,” he might say when I answered the phone．No pleasant _____ or inquiry about my life, just financial instructions. This manner of his angered me and we often ____．But one day, I thought about my father’s success in business and realized that his______for my financial security lay behind his short morning calls．The next time he called and told me to buy a stock，I______him．

When my social style has ______with that of my friends, I’ve often felt disappointed．For example, I always return phone calls _____ and regularly contact my friends．I expect the same from them．I had one friend who ______called, answering my messages with short e-mails．I rushed to the ______: She wasn’t a good friend! My anger grew as the holidays approached．But then she came to a gathering I _____ and handed me a beautiful dress I had fallen in love with when we did some window-shopping the previous month．I was shocked at her thoughtfulness, and ____ for how I’d considered her to be uncaring．Clearly I needed to ____ my expectations of friends.

Far too often, I ignored their ____ expressions, eagerly expecting them to do things in my way .Over the years, however, I’ve learned to ____ other persons’ love signs.

1.A. admire B. enjoy C. remember D. forget

2.A. excitedly B. silently C. nervously D. instantly

3.A. cold B. friendly C. attractive D. polite

4.A. Proudly B. Secretly C. Carefully D. Violently

5.A. boring B. caring C. funny D. stubborn

6.A. value B. respect C. love D. courage

7.A. warned B. telephoned C. visited D. interrupted

8.A. excuse B. meeting C. apology D. greetings

9.A. fought B. encouraged C. quarreled D. laughed

10.A. concern B. blame C. regret D. pride

11.A. thanked B. ignored C. held D. praised

12.A. associated B. conflicted C. agreed D. linked

13.A. in order B. in turn C. without delay D. without doubt

14.A. rarely B. regularly C. usually D. normally

15.A. judgment B. suggestion C. decision D. condition

16.A. opened B. refused C. hosted D. invited

17.A. depressed B. regretful C. fascinated D. pitiful

18.A. develop B. own C. find D. change

19.A. pleasant B. common C. unique D. familiar

20.A. give B. read C. write D. send

查看答案和解析>>

科目：高中英語 來源：四川省樂山市2017屆高三下學(xué)期第二次調(diào)研考試英語試卷 題型：完形填空

I drive daily to work on Highway Ⅷ.Each spring ___colorful wild flowers in the ditches____the road.There is one ___golden flower that has always caught my eyes.It blooms（開花）only in the __ hours-the afternoon sun is too warm for it.

Last spring,I stated a wildflower garden in our yard.I can look through the kitchen window while doing the___ and enjoy the flowers.Those lovely golden flowers from the ditch,I have often though,would look great in the bed alongside other wildflowers.I____past the flowers every day,thinking I’ll dig them home.“___,they may be hard to keep till the office time ends.” Or,“___,I don’t want to get my good clothes dirty.” Whatever the reason,I never stopped to dig them out.My husband even gave me a folding shovel to be used for that expressed ____

One day on my way to the office,I was____to see the highway department had weeded out the ditches and the golden flowers were____“You have on one to____but yourself-you waited too long.” I thought to myself,“You____have done it when you first saw them blooming this spring.”

Days later,I____the news that my sister has brain cancer.She is 12 years older than me and___,because of age and distance,we hadn’t been as____as we would have.I couldn’t help but see the____between the golden flowers and the relationship between my sister and me.__,thanks to God,we have some time left to____some wonderful memories that will bloom every year for us.

And when I catch sight of the golden flowers again this spring,you can____I’ll surely stop an transplant them to my garden.

1.A. grows B. brings C. holds D. removes

2.A. along B. off C. around D. in

3.A. strange B. superior C. particular D. common

4.A. day B. evening C. morning D. noon

5.A. homework B. repairs C. dishes D. exercise

6.A. stopped B. walked C. dashed D. drove

7.A. What’s more B. Thus C. Never mind D. However

8.A. Remember it B. Make it C. Forget it D. Catch it

9.A. pleasure B. anger C. purpose D. anxiety

10.A. delighted B. shocked C. frightened D. saddened

11.A. falling B. gone C. standing D. abandoned

12.A. question B. blame C. hire D. follow

13.A. should B. must C. would D. might

14.A. discovered B. studied C. proved D. learned

15.A. unfortunately B. surprisingly C. frequently D. interestingly

16.A. deep B. close C. good D. long

17.A. connection B. combination C. condition D. competition

18.A. So B. In fact C. Still D. Above all

19.A. remember B. plant C. form D. harvest

20.A. doubt B. wonder C. bet D. understand

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：短文改錯

假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有l(wèi)O處語言錯誤，每句中最多有兩處，每處錯誤僅涉及一個單詞的增加、刪除或修改。

增加：在缺詞處加一個漏字符號（八），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：在錯的詞下劃一橫線，并在該詞下面寫出修改后酌詞。

注意：1．每處錯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）不計分。

Last Sunday, I accompanied two of my foreign friend, Tom and Mary, to travel around Beijing. We began with touring South Luogu Lane(南鑼鼓巷) , which is known for their traditional Chinese architecture. I know a place very well so I acted as their tour guide ! For lunch, we had tried some Beijing fried sauce noodles(炸醬面). Tom in particular thought that they tasted deliciously. After lunch, we went to Houhai skate on the frozen lake. Mary was skating beautifully while Tom called for help. We finished the day with going shop, and both Tom and Mary bought some paper-cuts like souvenirs. It was a fantastic day but I hope they will come back again soon.

查看答案和解析>>

科目：高中英語 來源：高二英語人教版必修5Unit 1 Great scientists 題型：語法填空

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

In recent years many TV shows have become extremely popular among Chinese audience. Those programs, ranging from talent or dating shows to reality shows 1 (receive) both commercial success and public attention.

Their popularity is 2 (main) based on simple facts. First, they care 3 social concerns. Second, without exception, they explore a perfect balance between the international forms and Chinese expressions.

Despite apparent highlights, much room 4 (leave) for improvement. Above all, commercial interests often outweigh 5 （education）purposes, causing many complaints about the 6 (bearable) advertisements. In addition, some sharp remarks, 7 they are eye-catching, may have misleading effects on the youth.

In my opinion, such shows should shoulder more responsibility instead of merely 8 (entertain) the public. 9 is expected, these programs should be positive in their forms as well as functions. Meanwhile, the 10 (medium) should also safeguard the values of our society.

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：書面表達(dá)

書面表達(dá)(滿分25分)

假如你是李華，你的好友David在中學(xué)生英語歌詠比賽中榮獲一等獎。請你根據(jù)以下內(nèi)容，給他寫一封祝賀信。內(nèi)容包括：

1. 向他表示祝賀；

2. 請他介紹成功的經(jīng)驗；

3. 希望有一天能像他一樣取得成功。

注意：

1. 詞數(shù)100左右；

2. 開頭和結(jié)尾已為你寫好，但不計入總詞數(shù)；

3. 可適當(dāng)增加細(xì)節(jié)，以使行文連貫。

Dear David,

I hear that you have won first prize ___________________________________________________________

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours,

Li Hua

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：閱讀理解

The world itself is becoming much smaller by using modern traffic and modern communication means. Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest problems is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.

Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in one place, man moved to another place. But this is no longer true.

Man is now slowly polluting the whole world.

Air pollution is still the most serious. It’s bad for all living things in the world, but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.

Many countries are making rules to fight pollution. They stop people from burning coal in houses and factories in the city, and from putting dirty smoke into the air. Pollution by SO2 is now the most dangerous kind of air pollution. It is caused by heavy traffic. We are sure that if there are fewer people driving, there will be less air pollution.

The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must take care of the rise in pollution at the same time.

1. , our world is becoming much smaller.

A. Because of the rise in pollution

B. Because the earth is being polluted day and night

C. Thanks to science development

D. Because the earth is blown away by the wind every year

2.Air pollution is still the most serious kind of pollution because .

A. it makes much noise

B. it makes us angry more easily

C. it’s had for all living things in the world

D. it makes our rivers and lakes dirty

3.Which of the following is NOT true?

A. Many countries are making rules to fight pollution

B. The pollution of the earth grows as fast as the world population does

C. If people could go to work by bus or bike instead of car or motorbike, it would be helpful in fighting against the problem of SO2

D. The problem of pollution is not so serious because there are not so many people on the earth

查看答案和解析>>

科目：高中英語 來源：1.3 Unit 1 Using Language 題型：單詞拼寫

單詞拼寫

根據(jù)句意和首字母或漢語提示寫出單詞。

1.We’ve had a very __________(正面的) response to the idea.

2. He is very s__________ with his students.

3. David is very __________(熱情的) about the plan.

4. The teacher was patient with __________(退步的) children.

5. The teacher has __________(拒絕) all our ideas.

6. The boss is c__________ about making promises.

7. The police are watching the m__________ of the suspicious character carefully.

8. This theory predicates the big bang theory of the u__________.

9. Let’s s__________ the coin to decide whether to go or not.

10. She had a great eye for color and came up with some c_________ ideas for our house.

查看答案和解析>>

同步練習(xí)冊答案