You may not be aware, but digital currency (貨幣) is a big part of the Internet world. QQ Coins can buy you accessories (配飾) for your QQ images. More importantly, a new digital currency, Bitcoin, is bringing the world’s commerce online.

If you’re traveling, you can spend Bitcoins at restaurants and hotels listed at BitcoinTravel.com. In China, Bitcoins can be used to buy goods at about 134 online shops on Taobao. And at a café named 2nd Place in Beijing, you can even buy fresh coffee with Bitcoins.

So what makes Bitcoin so attractive to investors?

First of all, the Bitcoin system is not controlled by anyone. One central authority cannot make policies to change the value of Bitcoins. The fixed amount of Bitcoins also means they cannot lose value through inflation(通貨膨脹), as all forms of paper money have done over time.

In addition, accounts in the Bitcoin system are anonymous and transparent. Users can set up an account easily and track every Bitcoin. All of these features seem to make Bitcoins immune(有免疫力的) from loss, but that is not entirely true.

“The value of Bitcoins can vary wildly as no central government makes the price of them steady. If the value drops suddenly, investors cannot get any compensation(賠償),” Zhao Qingming, a senior researcher at China Construction Bank, told China Economic Weekly. And Bitcoins, unlike company shares, are not backed by any tangible funds, which also adds to their risk.

While China will not recognize the digital currency anytime soon, Xinhua said, lawmakers and officials at a hearing on Nov. 18 in the US made positive comments about Bitcoin.

Ben Bernanke, outgoing chairman of the Federal Reserve, told the Washington Post that “these types of creations, such as Bitcoin… may hold long-term promise, particularly if its system promote a faster, more secure and more efficient payment system.”

1.Bitcoin is ______.

A. actually exactly like QQ Coins

B. only used online

C. a new currency used both online and in real life

D a country’s new digital currency.

2.We can use Bitcoin to buy the following things except ______.

A. online goods

B. goods at 134 online shops on Taobao

C. books in physical shops

D. coffee at a café named 2nd Place

3.What is the disadvantage of Bitcoin?

A. the value of it can rise and fall wildly.

B. It cannot lose value through inflation.

C. Every bitcoin in your account can be followed.

D. It can even be used at some specific restaurants and hotels.

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2016屆江蘇省常州市兩校高三聯(lián)考英語試卷（解析版） 題型：其他題

任務(wù)型閱讀,請(qǐng)認(rèn)真閱讀下列短文，并根據(jù)所讀內(nèi)容在文章后表格中的空格里填入一個(gè)最恰當(dāng)?shù)膯卧~。注意：每個(gè)空格只填1個(gè)單詞。請(qǐng)將答案寫在答題卡上相應(yīng)題號(hào)的橫線上。

Antibiotics, insulin, organ transplantation, HIV treatments and heart-bypass surgeries—it reads like an A to Z of medical progress. But the major progress has something in common: they were all developed and tested by using animals. Actually, animals are used for research in a variety of settings. Whether or not humans should use animals for testing purposes, however, is a controversial subject.

Animal testing allows researchers to develop new medicine and treatments, advancing the field of medicine and improving the health of society. For example, many drugs used to treat or prevent cancer, HIV, diabetes, etc, have resulted from tests performed on animals. Many advocators of animal testing support the practice for this reason, even if they do not support testing, cosmetics or other non-essential substances on animals. No one chooses to use animals where there in no need. In fact, animal research has contributed to 70 percent of Nobel prizes for physiology or medicine.

Animal testing also enables scientists and researchers to test the safety of medicine and other substances with which humans have regular contact. Drugs, for example , may create significant risks to humans, so testing them on animals first gives researchers a chance to determine their safety before human trials are performed. While scientists understand the differences between humans and animals, the similarities are considered significant enough to produce relevant data that they can then apply to humans. This, animal testing reduces harm to humans and saves lives, not only because the exposure to risky substances is minimized, but because some new medicine and treatments have positive effects on humans’ overall quality of life.

However, a significant number of animals are harmed or die as a result of experiments and testing. Unfortunately, many of the substances used on animal subjects never receive approval for human use or consumption. Those who oppose animal testing consider this a very important point , because saving humans from suffering is no excuse for the death of laboratory animals. Opponents also argue that animals are dissimilar enough from humans to make the results of animals tests unreliable. Related criticism is that testing causes stress in animals, meaning that they do not react to experimental substances in the same way that they might in natural circumstances, making the results of experiments less valid

Using animals as research subjects is also expensive because they require food, shelter, care and treatment in addition to the costs of experimental substances. Long-term or multi-stage tests can increase the costs of the practice as well. The actual price paid for animals is also worth considering. In this respect, researchers take on an additional burden.

Title

Should Humans Experiment on Animals?

Introduction

Many __1.___ have been made on medical research by using animal testing

__2.______

about animal testing

People _3._____ up for it

New medicine and treatments can be developed.

Advancements in the field of medicine and _4._________ in humans’ health can be made.

Researchers can __5._____patients the safety of new treatments and medicine.

Scientists can collect research data in ____6.______ with humans’ medical problem.

Harm done to humans will be reduced to the 【小題7___ and more lives will be saved.

People opposing it

The experiments may put many animals’ lives at _7._______.

Experiments may not ____8.____ produce reliable results because animals do not react normally under stress.

Researchers will be __9._______ with the extra costs of animals and their care.

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年浙江杭州第二中學(xué)高二上學(xué)期期中英語試卷（解析版） 題型：單項(xiàng)填空

China’s one-child policy has been in place for decades and is causing ageing problem. So the news that China abandons one-child policy is _________ with cheers from many married couples.

A. behaved B. greeted C. hugged D. equipped

查看答案和解析>>

科目：高中英語 來源：2016屆江西上高縣第二中學(xué)高三上學(xué)期第二次月考英語試卷（解析版） 題型：閱讀理解

BEIJING — Rising smartphone star Xiaomi is moving upmarket and taking aim at Apple's iPhone. The Chinese maker known for low-priced phones on Thursday unveiled (發(fā)布) a new model that Chairman J un Lei said is comparable to Apple's iPhone 6 but thinner, lighter and much cheaper. The phone starts at 2, 299 yuan ($375), less than half the 5,288 yuan ($ 865) price of an iPhone 6 in China.

Xiaomi, founded in 2010, passed South Korea's SaM:ung Electronics Co. in the second quarter of last year as the best-selling smartphone brand in China by number of phones sold. The company is expanding into India and other developing markets but has yet to announce plans to enter the United States or Europe.

Xiaomi "is a respected brand that already has an Apple-like following" in China, said analyst Brian Blair, who tracks mobile device makers at Rosenblatt Securities. Apple is still a relatively small player in China, selling about 45 million iPhones there last year, Blair estimates, but will continue to grow.

"Apple is very much a premium (高端的) brand," said Blair. "The company that's more at risk is SaM:ung, which has been losing share in that market."

Privately held (私人控股的) Xiaomi said last year's sales tripled to 61. 1 million phones and revenue (收益) more than doubled to 74. 3 billion yuan ($12.2 billion). The company, based in Beijing, recently completed a round of fundraising from investors that it said valued Xiaomi at $ 45 billion, making it one of the world's most valuable technology brands.

Xiaomi ran into legal trouble in India in December after a court blocked sales while it hears a complaint by Sweden's LM Ericcson that the Chinese company violated its patents.

In a blog post earlier this month, Lei called the case a "rite of passage" (成年禮) for a young company.

1.Which of the following statements is true?

A. Xiaomi sold more cellphones than SaM:ung in 2010 in China.

B. Compared to Xiaomi, Apple's iPhone 6 is thinner and lighter.

C. Low-price is Xiaomi's advantage over Apple's iPhones.

D. The company is expanding into the United States or Europe.

2.What can be inferred from the passage according to Brian Blair?

A. More than 45 million iPhones will be sold this year.

B. Xiaomi can beat Apple in the market of China.

C. He thinks Xiaomi is superior to Apple.

D. SaM:ung will be closed for losing share in the market.

3.How is the 5th paragraph developed?

A. By giving examples.

B. By analyzing cause and effect.

C. By providing data.

D. By making comparisons.

4.What's the attitude of Jun Lei towards the case of Xiaomi in India?

A. Negative. B. Satisfied.

C. Positive. D. Doubtful.

查看答案和解析>>

科目：高中英語 來源：2016屆河北定州中學(xué)高三上學(xué)期第三次月考英語試卷（解析版） 題型：語法填空

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容(1個(gè)單詞$或括號(hào)內(nèi)單詞的正確形式。

Just now，I entered the website “Topic for Today”. I feel 1.________ (interest) in the report on middle school students’ using cell-phones on campus. In fact，more students now come to school2.________ cell-phones. My schoolmates have different opinions. Some think 3.________ is convenient to get in touch with others with the cell-phone，4.________also makes them feel safe especially in time of trouble. Besides，it is nice to enjoy 5.________ (variety) functions of different

cell-phones.

Others think differently. First，the cell-phone is not6.________ must in school，as there are some IC phones there，7.________ (make) it easy to call others. Second， many students often play e-games and send 8.________ (message) with their cell-phones，even in class， which will surely have bad effects on their study. What’s more， a large amount of time and money will 9.________ (waste).In my opinion，the cell-phone is a useful tool in our daily life. But it doesn’t mean we can use it 10.________ (free) in school.

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年山西大同一中高二12月單元測(cè)英語試卷（解析版） 題型：單項(xiàng)填空

There was a(n)________silence in the live interview，when no one knew what to say to the audience.

A．a(chǎn)shamed B．disappointed C．desperate D．a(chǎn)wkward

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年河南信陽高級(jí)中學(xué)高一12月月考英語試卷（解析版） 題型：七選五

根據(jù)短文內(nèi)容,從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑，選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

There is an old Spanish saying which states, "Tomorrow is often the busiest day of the week." How many times have we put off our dreams until tomorrow? 1. We have to go for them now!

·Tomorrow is not promised.

Nobody likes to talk about death, but everybody is going to die at one point. None of us know the day or the hour. 2. Don't go to your tomb with unrealized dreams. Make the decision to go after every dream, big or small right now.

·3.

One of the biggest dream killers is fear. Many people could have achieved amazing things if only they weren't afraid. Just think about all the things you've wanted to do, but allowed fear to convince you that you weren't capable, or good enough. Fear is not real. It is a product of thoughts you create. Choose not to let fear stop you from achieving your dreams.

·Take action to realize your dream.

You can dream about writing a great play but it's never going to happen unless you actually put pen to paper. You can dream about finding a cure for cancer, but it will never happen unless you actually become equipped with the necessary tools to find that cure. 4.

·Possibilities are waiting on you.

There are so many amazing opportunities and people waiting on you. How do you get to them? Simple! Follow your dream. 5. You'll never see those doors if you sit around waiting on a dream to happen, instead of actually working to make it happen.

A. Don't let fear win.

B. In other words, dreams don't work unless you do.

C. Our dreams should not, and cannot wait.

D. Therefore, today is all we have.

E. You'll be much happier if you go for it.

F. You were born into the world with a unique gift, which nobody can copy.

G. Doors that you couldn't imagine open up when you go after what you want.

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年福建連江縣尚德中學(xué)高二上學(xué)期期中英語試卷（解析版） 題型：其他題

課文填空

1.But he became ______when he thought about helping ordinary people _____ to cholera. 但他一想到要幫助那些得了霍亂的普通百姓時(shí)，他就感到很振奮。

2.Now when people _______ _______ England you find Wales ________ as well. 如今只要有人提起英格蘭，你就會(huì)發(fā)現(xiàn)威爾士總是包括在內(nèi)的。

3.Only if you ask many different questions _____ _____ _______ all the information you need to know. 你只有提出很多不同的問題之后才有可能獲得你需要知道的信息。

4.Remove clothing using scissors _______ ________ unless it is stuck to the burn. 除非衣服粘貼在燒傷面上，否則都要把它脫掉（必要時(shí)可用剪刀幫助）。

5.At first my new _________ were difficult to ____________.

一開始新的環(huán)境讓我很難忍受。

6.Hit by _____ ______ __ fresh air, my head ached. 由于缺乏新鮮空氣，我感到頭痛。

7.However, I ________ _________ of Wang Ping when we reached ________ looked like a large market because of too many carriages ______ by in all ________. 可是，當(dāng)我們到達(dá)一個(gè)看上去像大市場(chǎng)的地方時(shí)，由于太多車子朝四面八方飛奔，我看不見王平了。

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年四川廣元中學(xué)高二上學(xué)期第二次段考英語試卷（解析版） 題型：閱讀理解

Keeping pace with teachers is a fine way to study English. Teachers are experienced and their plans are systematic. But remember to work in a way that suits you. It's important to learn from past mistakes as well. Keep a notebook to make a record of the mistakes you make－it'll help you avoid making the same ones later.

The time of life may be hard，but you're not alone. You may be busy studying，but you can show your care by calling your friends or sending short messages. Don't let your friendships die.

It's as important to live well as it is to study well. Going to bed no later than 11：30 pm is vital（極重要的）. It puts you in the right mood for the next day. You needn't follow a special diet，but make sure you are eating nutritious meals each day.

The person who plays well，studies well. Having a lot of schoolwork doesn't mean having to give up other activities. Playing basketball or having a talk with your classmates can relax yourself. Time out is not a waste of time but helps you study more efficiently.

Besides taking the big exam，you have other choices for college. I took the independent enrollment exam held by Peking University and some other students even were preparing to study abroad. Pay attention to any relevant（相關(guān)的）information you can find，whether it's from school，the news media or other sources.

1.What should you do if you want to keep your friendship fresh?

A．Have frequent talks with them.

B．Always have lunch with them.

C．Remain them at some distance.

D．Keep connection by some ways.

2.The third paragraph is mainly about________．

A．study B．friendship

C．relaxation D．health

3.Which one is the closest meaning to “Time out” in Paragraph 4?

A．Sleep. B．Exercise. C．Continuation. D．Pause.

4.The passage is mainly written by a(n)________．

A．editor B．student C．teacher D．parent

查看答案和解析>>

同步練習(xí)冊(cè)答案