A new smart phone system under development can locate you even when you’re inside a building, which GPS can't do. While the concept sounds powerful, it’s not yet clear how practical it might be.
The set-up, called SurroundSense, sends information from cameras and microphones—gear in the latest smart phones—to a server that produces a fingerprint of the location.
“You can’t tell much from any of the measurements individually, but when combined, the optical (光学的), acoustic (声学的) and motion information creates a unique fingerprint of the space,” said Ionut Constandache, a student in computer science.
The system distinguishes between two indoor spaces in this manner: It knows that a bar is likely to be dark and noisy and people move little, sit a lot, whereas a department store will be brightly lit, contain vibrant colors, and will see a lot of people moving up and down passages. The more the system is used, the more it learns about specific places.
More work is needed before the set-up would be ready for prime time, however. For now, it can’t work if a person’s cellphone is in a handbag or otherwise unable to employ the camera. Finally it would be best served if paired with phones that were worn on the wrist or hung around the neck. Batteries, too, are a problem.
Students on the research team went out across Durham, North Carolina, with their cellphones collecting data in different types of businesses. The students mirrored the actions of the selected customers so that they would not prejudice the measurements.
“We went to 51 different stores and found that SurroundSense achieved an average accuracy (精确性) of about 87 percent," Constandache said.
“As the system collects and analyzes more and more information about a particular site, the fingerprint becomes more precise,” said Romit Roy Choudhury, professor of computer engineering. “Not only is the ambience different at different locations, but also can be different at different time at the same location.”We can infer from the first paragraph that GPS .
A.can find you wherever you are |
B.can make too much loud noise |
C.can only find outside things |
D.isn’t really practical yet |
Why did students mirror the actions of the selected customers?
A.To get a reasonable result. |
B.To collect data in different ways. |
C.To receive information about a particular site. |
D.To learn more about specific places. |
The underlined word “ambience” in the last paragraph may mean .
A.the fingerprint of the location |
B.the character of a place |
C.the existence of people |
D.the area of store |
The main idea of the passage is about .
A.comparing GPS with a smart cellphone |
B.the development of cellphones |
C.a cellphone knowing where you are |
D.what kind of future cellphones face |
Everyday we go to school and listen to the teacher, and the teacher will ask us some questions. Sometimes, the classmates will ask your opinions of the work of the class. When you are telling others in the class what you have found out about these topics, remember that they must be able to hear what you are saying. You are not taking part in a family conversation or having a chat(闲谈)with friends—you are in a slightly unnatural situation where a large group of people will remain silent, waiting to hear what you have to say. You must speak so that they can hear you—loudly enough and clearly enough but without trying to shout of appearing to force yourself.
Remember, too, that it is the same if you are called to an interview whether it is with a professor of your school or a government official who might meet you. The person you are seeing will try to put you at your ease(轻松)but the situation is somewhat(一点儿)different from that of an ordinary conversation. You must take special care that you can be heard.When you speak to the class, you should speak ________.
A.as loudly as possible | B.in a low voice |
C.loudly | D.forcefully |
Usually, when you speak to the class, the class is __________.
A.noisy | B.quiet | C.having a rest | D.serious |
The situation in the class is ________ that in your house.
A.not very different from | B.sometimes the same as |
C.sometimes not the same as | D.not the same as |
If you are having a conversation with an official, the most important thing for you is _______.
A.to show your ability | B.to be very gentle |
C.to make sure that you can be heard | D.to put the official at ease |
The main idea of this passage is ________.
A.that we must use different ways at different situations |
B.that we must speak loudly |
C.that we must keep silent at any time |
D.that we must talk with the class |
I found out one time that doing a favor for someone could get you into a lot of trouble. I was in the eighth grade at the time, and we were having a final test. During the test, the girl sitting next to me whispered something, but I didn’t understand. So I leaned over her way and found out that she was trying to ask me if I had an extra pen. She showed me that hers was out of ink and would not write. I happened to have an extra one, so I took it out of my pocket and put it on her desk.
Later, after the test papers had been turned in, the teacher asked me to stay in the room when all the other students were dismissed(解散). As soon as we were alone she began to talk to me about what it meant to grow up; she talked about how important it was to stand on your own two feet and be responsible (负责任) for your own acts. For a long time, she talked about honesty and emphasized(强调) the fact that when people do something dishonest, they are really cheating(欺骗) themselves. She made me promise that I would think seriously(认真地) about all the things she had said, and then she told me I could leave. I walked out of the room wondering why she had chosen to talk to me about all those things.
Later on, I found out that she thought I had cheated on the test. When she saw me lean over to talk to the girl next to me, it looked as if I was copying answers from the girl’s test paper. I tried to explain about the pen, but all she could say was it seemed very very strange to her that I hadn’t talked of anything about the pen the day she talked to me right after the test. Even if I tried to explain that I was just doing the girl a favor by letting her use my pen, I am sure she continued(继续) to believe that I had cheated on the test. The story took place(发生) exactly ____ .
A.in the teacher’s office | B.in an exam room |
C.in the school | D.in the language lab |
The girl wanted to borrow a pen, because ____ .
A.she had not brought a pen with her | B.she had lost her own on her way to school |
C.there was something wrong with her own | D.her own had been taken away by someone |
The teacher saw all this, so she asked the boy ____ .
A.to go on writing his paper | B.to stop whispering |
C.to leave the room immediately | D.to stay behind after the exam |
The thing(s) emphasized in her talk was(were) ____ .
A.honesty | B.sense of duty | C.seriousness | D.all of the above |
The boy knew everything ____ .
A.the moment he was asked to stay behind | B.when the teacher started talking about honesty |
C.only some time later | D.when he was walking out of the room |
So long as teachers fail to distinguish between teaching and learning , they will continue to undertake to do for children that which only children can do for themselves. Teaching children to read is not passing reading on to them. It is certainly not endless hours spent in activities about reading. Douglas insists that“ reading cannot be taught directly and schools should stop trying to do the impossible”.
Teaching and learning are two entirely different processes. They differ in kind and function. The function of teaching is to create the conditions and the climate that will make it possible for children to devise the most efficient system for teaching themselves to read. Teaching is also public activity. It can be seen and observed.
Learning to read involves all that each individual does to make sense of the world of printed language. Almost all of it is private ,for learning is an occupation of the mind ,and that process is not open to public scrutiny.
If teacher and learner roles are not interchangeable ,what then can be done through teaching that will aid the child in the quest(探索)for knowledge? Smith has one principal rule for all teaching instructions. “Make learning to read easy, which means making reading a meaningful, enjoyable and frequent experience for children. ”
When the roles of teacher and learner are seen for what they are, and when both teachers fulfill them appropriately, then much of the pressure and feeling of failure for both is eliminated. Learning to read is made easier when teachers create an environment where children are given the opportunity to solve the problem of leaning to read by reading.
The problem with the reading course as mentioned in the first paragraph is that ________.
A.it is one of the most difficult school courses |
B.students spend endless hours in reading |
C.reading tasks are assigned with little guidance |
D.too much time is spent in teaching about reading |
The teaching of reading will be successful if ________.
A.teachers can improve conditions at school for the students |
B.teachers can enable students to develop their own way of reading |
C.teachers can devise the most efficient system for reading |
D.teachers can make their teaching activities observable |
The underlined word“ scrutiny” most probably means“________”.
A.inquiry | B.observation |
C.control | D.suspicion |
According to the passage, learning to read will no longer be a difficult task when ________.
A.children become highly motivated |
B.teacher and learner roles are interchangeable |
C.teaching helps children in the search for knowledge |
D.reading enriches children’s experience |
The main idea of the passage is that ________.
A.teachers should do as little as possible in helping students learn to read |
B.teachers should encourage students to read as widely as possible |
C.reading ability is something acquired rather than taught |
D.reading is more complicated that generally believed |
A few days ago I asked my sons’ governess(女家庭教师)Julia to come into my study. “Be seated, Julia, ”I said, “Let’s settle our accounts. I guess you most likely need some money, but maybe you’re too polite to mention it. Now then, we agreed on thirty dollars a month...”
“Forty.”
“No, thirty. I made a note of it. I always pay our governess thirty. Well, um, you’ve been here two months, so...”
“Two months and five days.”
“Exactly two months. I made a special note of it. That means you have sixty dollars coming to you. Take off nine Sundays... you know you didn’t work with Tom on Sundays, you only took walks. And three holidays... ”Julia was biting her finger nail nervously, her face red, but - not a word.
“Three holidays, therefore take off twelve dollars. Four days Tom was sick and there were no lessons, as you were occupied only with Dick. Three days you had a toothache and my wife gave you permission not to work after lunch. Twelve and seven - nineteen. Take nineteen off ... that leaves. hmm.... forty one dollars. Correct?”
Julia’s left eye reddened with tears welling up. Her chin trembled; she coughed nervously and blew her nose, but - still not a word.
“Around New Year’s Day you broke a teacup and a saucer; take off two dollars. The cup cost more, it was a treasure of the family, but- forget it. When didn’t I take a loss! Then, due to your neglect (疏忽), Tom climbed a tree and tore his jacket; take away ten. Also due to your carelessness the maid stole Dick’s shoes. You ought to watch everything! You get paid for it. So, that means five more dollars off. The tenth of January I gave ten dollars.”
“You didn’t. ”sobbed Julia.
“But I made a note of it.”
“Well... if you say so.”
“Take twenty seven from forty one -that leaves fourteen.”
Both her eyes were filled with tears. Beads of sweat stood on the thin pretty little nose. Poor girl!
“Only once was I given any money,” she whispered, her voice trembling, “and that was by your wife. Three dollars, nothing more.”
“Really? You see now, and I didn’t know that! Take three from fourteen.. leaves eleven. Here’s your money, my dear. Three, three, three, one and one. Here it is !”
I handed her eleven dollars. She took them and pocketed them.
“Merci (法语: 谢谢),”she whispered.
I jumped to my feet and started pacing the room. I was overcome with anger. “For what, this - ‘merci’?” I asked.
“For the money. ”
“But you know I’ve cheated you - robbed you ! I have actually stolen from you ! Why this‘merci’?”
“In my other places they didn’t give me anything at all.”
“They didn’t give you anything? No wonder! I played a little joke on you, a cruel lesson, just to teach you... I m going to give you all the eighty dollars! Here they are in the envelope all ready for you... Is it really possible to be so spineless (懦弱)?Why didn’t you protest? Why were you silent? Is it possible in this world to be without teeth and claws(爪)—to be such a fool?”
Embarrassed, she smiled. And I could read her expression,“It is possible.”
I asked her pardon for the cruel lesson and, to her great surprise, gave her the eighty dollars. She murmured her little“merci”several times and went out. I looked after her and thought,“How easy it is to crush the weak in this world !”While talking to Julia, the wrier expected from her ________.
A.a protest | B.gratitude |
C.obedience | D.an explanation |
What shocked the writer was Julia’s ________.
A.nervousness in front of her boss |
B.acceptance of injustice |
C.shyness when talking about money |
D.reluctance to express herself |
The writer said, “Is it possible in this world to be without teeth and claws?” He was actually telling the governess ________.
A.to be more aggressive |
B.to be more careful in her work |
C.to protect her right |
D.to live independently |
At the end of the story, the writer said,“ How easy it is to crush the weak in this world!”to show ________.
A.his understanding of Julia’s anxiety |
B.his worry about Julia’s future |
C.his concern on the living condition of working - class people |
D.his sympathy for the mental state of those exploited |
From the story, we can tell that Julia’s employer was ________.
A.greedy but honest |
B.ill - tempered but warm - hearted |
C.strict but forgiving |
D.none of the above |
How many coins nave you got in your pocket right now? Three? Two? A bent one?
With a phonecard you can make up to 200 calls without any change at all.
(1) What do you do with it?
Go to a telephone box marked(you guessed it)“phonecard”.Put in your card, make your call and when you’ve finished, a screen tells you how much is left on your card.
(2) Now appear in a shop near you.
Near each Cardphone place you’ll find a shop where you can buy one. They’re at bus, train and city tube stations(地铁).
Many universities, hospitals and clubs. Restaurants and gas stations on the highway and shopping centres. At airports and seaports.
(3) No more broken payphones.
Most broken payphones are like that because they’ve been vandalized(故意破坏). There are no coins in Cardphone to excite thieves’ interest in it. So you’re not probably to find a vandalized one.
Get a phonecard yourself and try it out ,or get a bigger wallet.The passage is most probably ________ .
A.a warning |
B.a note |
C.an advertisement(广告) |
D.an announcement |
There are three sections(部分) in the passage. Which section do you think is about why phonecards are good?
A.Section 1. | B.Section 2. |
C.Section 3. | D.None. |
Choose the right order or the steps under“How do you use a phonecard”.
a. Put in your phonecard.
b. Look at the screen to find out how many calls you can still make.
c. Go to a telephone box marked “Phonecard”.
d. Make your call.
A.a, b, c, d | B.c, a, d, b |
C.a, d, c, b | D.c, d, a, b |