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.”
1.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
2.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.
3.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
4.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
科目：高中英语 来源：江苏省牛津译林版英语Module5 Unit2 复习练习 题型：完成句子
1.The house _________ (build) now are for the teachers.
2._________(tell) many times, he still repeated the same mistakes.
3._________ (complete) the program, they have to stay here for another two weeks.
4.Much to our surprise, the two girls are still sitting on the ground, _________ (absorb) in talking.
5._________ (remind) not to miss the flight at 15:20, the manager set out for the airport in a hurry.
6._________ (not finish) the homework, the little girl doesn’t dare to go to school.
7._________ (see) from the space, the earth, with water_________ (cover) seventy percent of its surface, looks like a blue ball.
8.Lily’s mobile phone was left in a taxi accidentally, never_________ (see) again.
9.The students are advised _________ (take) more exercises.
10.She caught the student _________ (pick) flowers _________ (smell) sweet in the garden.
11._________ (judge) from his _________ (excite) news, his friends have found the key to __________ (solve) the problem.
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科目：高中英语 来源：福建省莆田市2018届高三第一次月考英语试卷 题型：短文改错
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。 温馨提醒：改错题需按要求规范答题，否则不能得分！
增加：在缺词处加一个漏字符号(Λ)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词;
2. 只允许修改10处，多者(从第11处起)不计分。
Ladies and gentlemen, today I’m going to share something amazed about dolphins. For ages, the sailors have said that it is good luck to see dolphins swimming alongside boats. Their presence meant that land is near, which will be vital informations if a boat and its crew are in danger. Some dolphins have even protected sailors which suffer shipwreck from sharks. There is no wonder that these unique and fascinating creatures have long known as our friends.
Dolphins are thought to be intelligent animals because of its quick ability to learn. They seem to communicate with each other through a combination of whistles and clicks. While scientists don’t know exact what they are talking about, it is thought that dolphins are telling each other that food is nearby, or warn each other of approaching danger.
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科目：高中英语 来源：河南省南阳市六校2016-2017学年高二下学期第二次联考英语试卷 题型：书面表达
为了鼓励在家多读，联合国教科文组织确定4月23日为“世界读书日” (World Book Day)。请你写篇英语短文呼吁同学们多读书。内容应包括：
1.简述世界读书日（时间及目的)；
2.读书的益处；
3.呼吁同学们多读书。
注意：1.词数100左右；
2.可以适当增加细节，以使行文连贯。
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科目：高中英语 来源：河南省南阳市六校2016-2017学年高二下学期第二次联考英语试卷 题型：阅读理解
Two 5-year-old girls, best friends, held hands in Tolson’s office at Van Ness Elementary School in Washington, D.C., one saying she didn’t feel well. Tolson, the school nurse, asked, “How long has your stomach been hurting?” “It just started,” she said.
The other one said her head hurt last night, too. Tolson knew she had a history of fevers, so she checked her temperature and asked her what she ate, whether she went to the bathroom, and whether her head still hurt. It could be that these two little girls that went to Tolson’s office were fine. Or maybe they had mental problems. And that is what school nurses have to judge every day.
School nurses generally get very little training when it comes to mental health. Mazyck said she herself was astounded when she was a school nurse. She saw upset, anxiety, sadness and students who didn’t even know what to do to calm themselves down. She never expected these. So Mazyck went back to school for a graduate degree in counseling (咨询) and now she focuses on getting nurses more training in mental health.
Sharon Stephan, who co-directs the National Center for School Mental Health at the University of Maryland, tells nurses there are two simple questions to ask themselves to see if a child needs help:
Is the student acting or behaving differently than he/she was before?
Is the student somehow far outside the norm (标准) of what you would expect?
The only time everyone pays attention is when there’s a tragedy(悲剧), like a school shooting. However, we actually can catch the students who might harm others and recognize the students who might want to kill themselves.
Mental health is ranked one of the top problems all school nurses deal with, and school nurses need to be better at it.
1.Why does the author mention the two little girls?
A. To show school nurses do a difficult job.
B. To show the importance of school nurses.
C. To show school nurses need much patience.
D. To show the importance of students’ health.
2.What does the underlined word “astounded” in the third paragraph mean?
A. Tired. B. Troubled.
C. Shocked. D. Embarrassed.
3.Why did Mazyck go back to school?
A. To give nurses more training in mental health.
B. To find school students with mental problems.
C. To learn what mental problems students may have.
D. To improve her skills of dealing with mental health.
4.What can we learn from the last but one paragraph?
A. There are too many kids in need of help.
B. Something tragic often happens at school.
C. Students’ mental health is always ignored.
D. It’s hard to find students with mental problems.
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科目：高中英语 来源：2014-2015学年湖北武汉第二中学高二上期中英语试卷（解析版） 题型：完形填空
完形填空(共20小题；每小题1分，满分20分)
If you ever feel as if you are being knocked about by life, think about the amazing bird called the Water Ouzel. I can’t imagine this waterbird knows what it is to have a day. The little creature is often found living next to waterfalls and rivers rushing fast. And however threatening the weather, however the water, in snow and rain, the tough and cheerful Water Ouzel can be chirping and singing. What's more, while the of most songbirds, however melodious in warm weather, fall over long winter months, the hearty Water Ouzel on through all seasons and every kind of . I have to wonder: does this little creature know anything I don't?
It's as if the knows that every violent storm will eventually sunshine; every dark night will finally fade into . And isn't it true? Even our bleakest and stormiest times do not forever. Like the poor man in the cement mixer(混凝土搅拌机), there is almost always an end to the .
As the incredible humanitarian novelist Harriet Beecher Stowe said, “ you get into a tight place and everything you till it seems as though you could not hold on a minute longer, never give up then, for that is just the place and time that the tide will .” I have had that more times than I can remember.
Maybe this is one of those days you feel as if you are the cement mixer. If so, do you need to a little longer?
1.A. dull B. long C. bad D. wonderful
2.A. violent B. distant C. calm D. slow
3.A. deep B. cold C. clear D. dirty
4.A. recorded B. kept C. taught D. heard
5.A. sizes B. colors C. voices D. shapes
6.A. silent B. sleepy C. ill D. deaf
7.A. lives B. sings C. survives D. flies
8.A. time B. river C. music D. storm
9.A. bird B. novelist C. man D. farmer
10.A. take place of B. get away from C. give way to D. catch up with
11.A. dawn B. dusk C. noon D. night
12.A. come B. last C. stay D. go
13.A. concerned B. cared C. complained D. puzzled
14.A. party B. story C. trouble D. day
15.A. when B. because C. although D. whether
16.A. takes in B. goes against C. gets over D. cuts off
17.A. end B. go C. rise D. turn
18.A. experience B. memory C. idea D. sight
19.A. beside B. on C. in D. with
20.A. take up B. hold on C. put off D. bring in
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科目：高中英语 来源：2014-2015学年湖北武汉第二中学高二上期中英语试卷（解析版） 题型：单项填空
I remain that a peaceful settlement of the dispute can be achieved.
A. original B. optimistic
C. cautious D. complex
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科目：高中英语 来源：贵州省遵义市2016-2017学年高二下学期期末考试英语试卷 题型：完形填空
Bonnie's Miracle
My sister Bonnie and her husband Bob owned their own flower shop.But flowers were becoming____at more and more local stores and through the Internet.____their business was not as good as it had been three years earlier when they____it.For about a year,Bonnie and Bob discussed____they should do.They debated selling.They talked about____it into a gift shop or maybe a bookstore.But there just wasn't enough____or people around the area to ____the business.
Feeling helpless,Bonnie began____praying and asking God for answers.She____,"God,give me a sign telling us what You want us to do.Call me on the____,"she said,"and show me what to do."
Soon the phone rang.A young woman was asking how much they wanted for the____."My husband and I never take the road beside____shop,"she said,"but we were driving by yesterday and saw the 'For Sale' sign in the____."
Puzzled,Bonnie replied,"There isn't a sign in the window.My husband and I have been discussing whether or not we should sell,but haven't reached a____.""But I saw the sign!"the young lady____insisted."My husband saw it too.It was blue and white in the____picture window____the road.
It____that the sign was the reflection（反射）of a house's poster put up____to the window on the other side of the road.Anyhow,within two weeks,the young lady and her husband____the flower shop at a handsome price.
1.A. available B. free C. beautiful D. expensive
2.A. However B. Thus C. Still D. Even
3.A. enjoyed B. saw C. started D. met
4.A. how B. whether C. when D. what
5.A. destroying B. changing C. opening D. shutting
6.A. cars B. goods C. traffic D. communication
7.A. stop B. prove C. compete D. support
8.A. sincerely B. sadly C. happily D. quickly
9.A. asked B. answered C. prayed D. wrote
10.A. door B. shop C. book D. phone
11.A. business B. sign C. method D. work
12.A. their B. our C. my D. your
13.A. wall B. window C. ground D. roof
14.A. goal B. contract C. decision D. judgment
15.A. hardly B. firmly C. shyly D. bravely
16.A. large B. small C. dirty D. rough
17.A. standing B. checking C. facing D. touching
18.A. looked out B. took out C. brought out D. turned out
19.A. opposite B. next C. similar D. close
20.A. hired B. bought C. raised D. discovered
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科目：高中英语 来源：河南省周口市2016-2017学年高一下学期期末考试英语试卷 题型：阅读理解
Next fall when you see geese heading south for the winter or flying in “ V” formation (队形), you might consider what science has discovered as to why they fly that way.
As each bird spreads its wings，it creates an uplift (上升力) for bird immediately following. By flying in “ V” formation the whole flock (鸟群) adds at least 71% greater flying range, than if each bird flies on its own. People who share a common direction arid sense of community can get where they are going more quickly and easily because they are traveling on the thrust (推动力) of one another.
When a goose falls out of the formation, it suddenly feels the drag and resistance of trying to go it alone and quickly gets back into formation to take advantage of the lifting power of the bird in front. If we have as much sense as a goose, we will stay in formation with those who are headed the same way we are. When the head goose gets tired, it flies backwards and another goose flies point. It is sensible to take turns doing demanding jobs, whether it is with people or with geese flying south.
Geese honk (雁叫) from behind to encourage those up front to keep up their speed. What do we say when we honk from behind?
Finally and this is important, when a goose gets sick or is wounded by gunshots, and falls out of formation, two other geese fall out with that goose and follow it down to lend help and protection. They stay with the fallen goose until it is able to fly or until it dies, and only then do they launch out on their own, or with another formation to catch up with their group. If we have the sense of a goose, we will stand by each other like that.
1.The first three paragraphs chiefly deal with .
A. scientific discovery about geese.
B. the importance of flight formation.
C. the advantages of “V” formation.
D. the reasons for geese’s flight.
2.The phrase which can best replace “stand by” in the last sentence is “ ”.
A. be against. B. support.
C. sit by. D. obey.
3.What does the author want us to learn from the geese?
A. Teamwork. B. Sympathy.
C. Kindness. D. Intelligence.
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