精英家教网 > 高中英语 > 题目详情

Computer power is moving into the “cloud”—networks of data centres that use the Internet to supply all kinds of services, from e-mail and social networks to data storage and analysis.

The rise of cloud computing is rapid and causing huge changes in the tech industry. The old guard is suffering: this week’s $67 billion merger (合并) between Dell and EMC, makers of computers and storage devices respectively (分别), was a marriage forced by the rise of the cloud. Disruptive (捣乱的) newcomers are blooming: if Amazon’s cloud-computing unit were a stand-alone public company, it would probably be worth almost as much as Dell and EMC combined.

The gains for customers have been equally dramatic. Compared with older IT systems, cloud computing is often much cheaper. It adds tremendous flexibility: firms that need more computing capacity no longer have to spend weeks adding new servers and installing software. In the cloud they can get hold of it in minutes. Their applications can be updated continually, rather than just every few months. Individual users can reach their e-mails, files and photos from any device. And cloud services also tend to be more secure, since providers know better than their customers how to protect their computing systems against hackers.

But cloud computing makes one problem worse. In the old IT world, once a firm or a consumer had decided on an operating system or database, it was difficult and costly to switch to another. In the cloud this “lock-in” is even worse. Cloud providers go to great lengths to make it easy to upload data. They accumulate huge amounts of complex information, which cannot easily be moved to an alternative provider.

Cloud firms also create a world of interconnected services, software and devices, which is convenient but only for as long as you don’t venture (冒险) outside their universe. Being locked in to a provider is risky. Firms can start to tighten the screws by increasing prices. If a cloud provider goes bust (崩溃), its customers may have trouble getting back their data.

These risks have already caused a debate about whether the cloud needs stricter regulation. Some European politicians want to force cloud providers to ensure that data can be moved between them. That is too heavy-handed, because strict rules will inhibit (阻碍) innovation in what is still a young industry. The history of computing suggests that common standards may well appear naturally in response to customers’ demands—just as in personal computers, where it is now much easier to use the same files on different systems.

In the meantime, a few commonsense measures can reduce the risk of lock-in. Firms that use more than one cloud provider to host their data are less affected. So are those that keep their most important information in their own data centres. Consumers can take precautions, too. Some services are better than others at enabling users to move data between providers (Google does well on this score). Cloud computing promises its users many benefits, but don’t mistake it for some sort of digital heaven.

1.The author takes “the merger between Dell and EMC” for example to show ________.

A. the influence of cloud computing on computer and storage device makers

B. the miserable sufferings of old computer companies

C. the rapid development of new computer companies

D. the interaction between old companies and newcomers

2.With wide applications of cloud computing customers can ________.

A. pay less for the older IT systems

B. gain more computing capacity quickly

C. know better about defeating the hackers

D. install software within weeks

3.The problem of “lock-in” can be dangerous because ________.

A. it should ensure data can easily be moved to another provider

B. it can create a network of services connected with devices

C. it may make it difficult for customers to recover their data

D. it will discourage an argument about stricter rules

4.It can be inferred from the last two paragraphs that ________.

A. the European politicians’ advice is perfect

B. customers’ demands play a role in setting standards

C. lock-in is caused by firms’ storing information in their own centres

D. Google enables users to provide services and move data

5.Which of the following sayings can best express the main idea of the passage?

A. Everything has its time and that time must be watched.

B. The grass looks greener on the other side of the fence.

C. A candle lights others and consumes itself.

D. Every white has its black, and every sweet has its sour.

练习册系列答案
相关习题

科目:高中英语 来源:2016届宁夏六盘山高级中学高三第四次模拟考试英语试卷(解析版) 题型:书面表达

2015年7月31日,北京申办2022年冬奥会成功。假定你是美国人Peter,请给你中国的笔友李华写一封电子邮件,祝贺北京申冬奥会成功。要点如下:

1.表示祝贺;

2.届时有意来做志愿者;

3.预祝冬奥会圆满成功。

注 意:1.词数100左右;2.可适当增加细节,以使行文连贯;3.信的格式已给出。

参考词汇:冬奥运Olympic Winter Games

Dear Li Hua,

Yours,

Peter

查看答案和解析>>

科目:高中英语 来源:2015-2016学年云南昆明三中高二下期中考试英语卷(解析版) 题型:阅读理解

Last week, I bought an alarm system(报警系统) for about $ 450. It consisted of a control unit with three other small units. I put the control unit in the sitting room and fastened the other units by the front door, back door and living-room windows. The instructions told us to choose three numbers, so we chose 491, the last three numbers of our telephone number.

Now I must explain how the alarm works:

1. There is a power siren(警报器) in the control unit. It makes a very loud noise.

2. Each of the small units sends out beams(光束) or rays in different directions. If anything moves, it breaks a beam. This sends a signal to the control unit. The siren makes a noise that you can hear 50 meters away.

3. When we go to bed, I press the three buttons numbered 4, 9 and 1. Then we have 30 seconds to get out of the room before the alarm starts to work.

That might I slept soundly because I was sure that no burglar(夜贼) could get into our house. However, at about 2:10a.m., I woke up and heard the siren(警报).

“There must be a burglar in the house,” Mary said. “What shall we do?”

“I’ll go and see who’s there,” I said. “Stay here. Don’t make a noise.”

I went downstairs quietly. When I reached the living room, I switched on my torch and looked round the room. Then I turned the light on. I switched the siren off and searched the rooms downstairs. There was nothing wrong except that the back door was unlocked. I locked it, re-set the alarm and went back to bed.

About an hour later, the alarm started again. I jumped out of bed, fell over a chair in the dark and bumped into the bedroom door. Mary woke up and started hitting me with a torch. “Hey! Wait a minute!” I whispered. “It’s only me. I’ m going downstairs to see what’s wrong.”

I went down into the living room and listened for a moment. The only sound I could hear was the siren. I turned on the light and then switched the siren off. As I did so, I glanced across at the curtains in front of the windows. I saw a house lizard (蜥蜴) disappear behind the curtains.

“Oh!” I said to myself. “That’s our burglar.”

When the lizard moved, it started the siren. I guessed that the alarm had been made in Europe, where there are no house lizards.

Well, I won’t finish this story but if you want an alarm system free of charge, let me know. I’ll send you ours. We bought a dog this morning. It knows the difference between a lizard and a burglar.

1.The writer bought an alarm system to .

A. make sure that he got up early every day

B. warn him when there were lizards in his house

C. frighten burglars and tell him that somebody had got into the house

D. make Mary feel safe to live in the large room

2.The purpose of the three units was to .

A. send a message to the control unit and start the siren

B. sound their own sirens when the control unit told them to

C. check that the control unit worked properly all the time

D. give them enough light

3.What can we learn from the passage?

A. A burglar broke into the writer’s house.

B. The writer’s wife was attacked by the burglar.

C. The alarm that the writer bought must be made in Europe.

D. It was a lizard that broke into the writer’s house.

4.The purpose of the writer in writing the passage is to .

A. tell us that the alarm system doesn’t work

B. tell us an interesting experience

C. show us how the alarm system works

D. make it clear that he wants to give away his alarm system

查看答案和解析>>

科目:高中英语 来源:2015-2016学年四川成都外国语学校高二下期中考试英语试卷(解析版) 题型:单项填空

I knew we would be good friends I met her.

A. for the first time B. the first time

C. at the first time D. in the first time

查看答案和解析>>

科目:高中英语 来源:2015-2016学年四川成都外国语学校高二下期中考试英语试卷(解析版) 题型:单项填空

When the foreign guest arrived, I found him speaking good Chinese. I his speech into Chinese the night before.

A. needn't translate

B. didn't need to translate

C. needn't have translated

D. didn't need translatin

查看答案和解析>>

科目:高中英语 来源:2016届江苏苏锡常镇四市高三教学情况调研(二)英语试卷(解析版) 题型:单项填空

—How can I live my dreams in a short time?

—Be practical. Between you and your dreams ________ a lot of hard work.

A. stand B. stands

C. is standing D. are standing

查看答案和解析>>

科目:高中英语 来源:2016届江苏苏锡常镇四市高三教学情况调研(二)英语试卷(解析版) 题型:单项填空

In time of anger, do yourself a favor by ________ it in a quiet place so that you won’t be hurt by its flames.

A. releasing B. recovering

C. refreshing D. recycling

查看答案和解析>>

科目:高中英语 来源:2015-2016学年贵州思南中学高一下期中考试英语卷(解析版) 题型:完形填空

完形填空

阅读下面短文,从短文后各题所给的四个选项(A、B、C、D)中,选出可以填入空白处的最佳选项。

What do you think of that? One man donated(捐赠) his stem cells (干细胞)to a(n) _______ living on the other side of the world.

A man working as a taxi driver in Shanghai _______ an activity about stem cell donation. Shortly after, he received the ____ that his stem cells had been matched to a boy in England. The receiver is just seven years old. The driver, Jiang Yongfeng, _____ to donate his stem cells at once. “I did not expect it to happen so ____. I was so excited to get a match so soon.” He says. “_____ I learned the boy was only born in 2008, I was silent. And I ____ I made the right decision. I must help him.”

Some people ____ stem cell transplants to treat cancer. They must ______ a donor with nearly the same genes(基因). It means the matched _____ must have the very similar gene. The possibility of the long-distance match between Jiang Yongfeng and the little boy is _____. It sounds like a ____miracle(奇迹). “ The little boy receiving Jiang’s donation is very ____, ” doctors said.

Some donors were ____ to donate stem cells in out-dated ways because of poor health care systems years ago. It was a(n) _____ experience that many people couldn’t stand. ____, Mr. Jiang was able to use a simpler and safer method.

Usually donors and receivers do not meet, nor do they know each other’s _____. Does Jiang Yongfeng mind that he doesn’t even know the little boy’s name? “ No,” he shakes his ____. “ I just want the operation to be done as soon as possible so that they can send my _____ to the UK and help the little kid _____ as soon as possible. I hope he can be brave and strong and that he can live a good life.

1.A. baby B. friend C. stranger D. animal

2.A. took part in B. came up with C. caught up with D. gave in to

3.A. invitation B. survey C. donation D. news

4.A. remembered B. agreed C. needed D. afford

5.A. nervously B. patiently C. secretly D. quickly

6.A. When B. Before C. Though D. Because

7.A. accepted B. realized C. remembered D. forgot

8.A. need B. sell C. change D. provide

9.A. help B. treat C. find D. visit

10.A. team B. group C. pair D. family

11.A. big B. high C. clear D. small

12.A. medical B. chemical C. special D. natural

13.A. brave B. lucky C. healthy D. shy

14.A. offered B. awarded C. required D. planned

15.A. painful B. easy C. practical D. expensive

16.A. Firstly B. Sadly C. Quickly D. Luckily

17.A. name B. address C. hospital D. number

18.A. body B. hands C. head D. eyes

19.A. information B. cells C. money D. letter

20.A. smile B. understand C. learn D. recover

查看答案和解析>>

科目:高中英语 来源:2015-2016学年吉林长春外国语校高一下期中考试英语试卷(解析版) 题型:完形填空

完型填空

阅读下面短文,从短文后各题所给四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

Not a lot of people know that helping others can be _________ at the same time, because the joy you get from helping others is really worth the trouble you take to do it.

I live in a city with a lot of homeless people. Fortunately there are always small ways of helping them and you needn’t have a lot of _________ . One way to help is to buy their monthly magazine. _________ doing this one day, I got to _________a homeless young man. He was often _________ the magazine at the train station. Later I got to know that he was a poor farmer from another country. After a while, I also discovered that his _________ was close to mine. It _________ that we were born in the same month.

I met him last year _________after his birthday, and after _________ him, without_________ too much, I asked if he had had a good day. He _________ his head and said that he had not really celebrated it. I felt so _________ . I just couldn’t bear the thought of this nice young man being alone on his 25th birthday with no presents, no cake, _________ at all. So I went home and looked in my yarn (纱线) basket. _________ for me, I had enough yarn left. I set to work and knitted a _________ for the young man. The yarn had become a little dirty_________ I didn’t knit very often. Then I washed the yarn so the scarf would be _________ when he got it.

I met him on my own birthday as I was going shopping. I had _________ to meet him so I had_________ the scarf and a piece of birthday cake around with me. He was very happy with these gifts and so was I. The _________ in his eyes was the best present he could have given me.

1.A. rewarding B. surprising C. annoying D. confusing

2.A. work B. money C. energy D. experience

3.A. By B. For C. Without D. Besides

4.A. realize B. ignore C. know D. recognize

5.A. reading B. selling C. covering D. buying

6.A. hobby B. height C. habit D. birthday

7.A. believed B. said C. happened D. found

8.A. long B. shortly C. ever D. currently

9.A. thanking B. congratulating C. ignoring D. praising

10.A. thinking B. helping C. stopping D. minding

11.A. slowed B. raised C. reduced D. lowered

12.A. angry B. sorry C. happy D. crazy

13.A. something B. nothing C. anything D. everything

14.A. Fortunately B. Surprisingly C. Suddenly D. sharply

15.A. sweater B. cap C. glove D. scarf

16.A. because B. so C. and D. but

17.A. contaminated B. clean C. transparent D. luminous

18.A. hoped B. promised C. agreed D. loved

19.A. fetched B. lift C. carried D. held

20.A. light B. flash C. color D. sight

查看答案和解析>>

同步练习册答案