As we know, DNA testing is very useful for crime fighting. But now crime fighters could have a new tool at hand. Researchers have developed a cutting-edge (前沿的) technique to identify human hair. Their test is quicker than DNA analysis techniques currently used by the police.
DNA testing is commonly used for identification because DNA is unique to each individual. However, environmental and chemical processes can degrade(降解) DNA, limiting its usefulness over time. Protein (蛋白质) in hair, on the other hand, is more stable than DNA but can also have variations (变异体) that may be unique to the individual.
“Our analysis process can be used universally, ”says Ms. Huang, “One of our samples even included dyed hair and the test was 100 per cent accurate. The test was able to distinguish East Asians, Caucasians and South Asians.”
Dr. Beauchemin says she has got in touch with law enforcement agencies about using the new technology. She is also planning to collect more hair samples and continue her research with a goal of finding where exactly in the world hair sample is from, to look for more races and determine specific age.
“We are in a very similar place with protein-based identification to where DNA testing was during the early days of development,” said chemist Brad Hart. “This method will be a game-changer, and while we’ve made a lot of progress toward improving it, there are steps to go before this new technique is able to reach its full potential.”
1.What’s the main purpose of the text?
A. To analyze crime scenes.
B. To distinguish different races.
C. To show the usefulness of DNA testing.
D. To introduce a new identification method.
2.Which will be the most useful in identifying a person according to Brad Hart?
A. Chemical materials. B. Protein in hair.
C. DNA variations. D. Blood sample.
3.What’s the advantage of the protein-based identification over DNA testing?
A. Stability. B. Popularity.
C. Security. D. Convenience.
4.What can be inferred from the last paragraph of the text?
A. DNA testing will soon reach its full potential.
B. Protein-based identification remains to be improved.
C. Protein-based identification has replaced DNA testing.
D. DNA testing develops as rapidly as protein-based identification.
导学全程练创优训练系列答案科目：高中英语 来源：辽宁省鞍山市2017届高三下学期最后一次模拟考试英语试卷 题型：完形填空
The Cost of Dishonesty
David began studying in Germany two years ago. The college was a little __ from where he lived, so he had to take the __ every day. This clever student soon found it was easy to __ buying subway tickets, so he often went and returned __ a ticket to save money. As a result, he had been caught with no ticket in the subway four times __ he never took them to __ . He thought what he should pay __ attention to was his study. He did work very hard in the last two years and graduated with __ academic achievements a month ago. Everyone, __ himself, thought he would get a good job easily in __ and had a bright future. He went to a big local company __ . But to his __, he was not even allowed his chance for a/an __ ! He then went to another famous company, only to receive the same __ . When he was __ a third time, he __ help telephoning the company to ask why they didn’t want him. The answer was simple, “We don’t offer jobs to __ people in Germany!”
We may get short-term __ by dishonest means, but the truth will come out __ and the cost is high. So remember, honesty is the best____.
1.A. near B. away C. far D. close
2.A. bus B. car C. vehicle D. subway
3.A. skip B. miss C. flee D. forget
4.A. for B. without C. by D. with
5.A. while B. although C. but D. because
6.A. heart B. mind C. soul D. spirit
7.A. much B. more C. less D. little
8.A. exciting B. depressing C. shocking D. amazing
9.A. regarding B. including C. considering D. concerning
10.A. America B. China C. Germany D. Britain
11.A. confidently B. fortunately C. nervously D. willingly
12.A. surprise B. excitement C. delight D. disappointment
13.A. interview B. exam C. conversation D. meeting
14.A. achievement B. treatment C. argument D. improvement
15.A. turned down B. turned over C. turned up D. turned off
16.A. wouldn’t B. shouldn’t C. couldn’t D. mustn't
17.A. immature B. dissatisfied C. dishonest D. unconfident
18.A. benefits B. impression C. profits D. harm
19.A. on time B. in time C. at times D. in no time
20.A. direction B. advice C. suggestion D. policy
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科目：高中英语 来源：湖南省湘潭市、长沙、师大附中、岳阳市、株洲市二中、常德市2017届高三下学期六校联考英语试卷 题型：七选五
How to survive and thrive
Here are some tips to help you learn not only to survive, but to thrive(有成) and grow in a chaotic world.
Try to build on strengths rather than focus on weaknesses.
1.Maybe you’ll become an auto mechanic, or maybe you’ll make good use of your ability to classify detailed information to build a career as biologist or druggist.
Realize that few mistakes are disastrous.
Did you fail a course? 2.Most of us can’t avoid an occasional failure, but we can learn bounce-back attitudes through failures.
3.
Cecelia, a shy twelve-year-old, became livelier when she won the lead in a school play. “We want you to improve your grades, not spend time on plays!” said her worried mother. 4.And she made new friends with the “good kids” who were also achievers. Most importantly, no matter what happens, Cecelia can return to that feeling of success whenever she gets discouraged.
Getting into a top university—or any university – will not guarantee success.
I’ve met high school drop-outs who became very successful. 5. Career-changers who face the future with an attitude of “I can handle anything” are the ones who win today. While in difficulties, they keep up their spirits till they figure out what to do next.
A. Have no idea about your future plan?
B. Face rejection from a first-class college?
C. Life is hard at the moment, but we’re surviving.
D. Try to experience success in any area of your life.
E. To everyone’s surprise, Cecelia’s grades improved.
F. Do you spend hours studying models of cars for the last twenty years?
G. I’ve met people from top universities who experienced unemployment and even homelessness.
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科目：高中英语 来源：东北师大附中、哈尔滨师大附中、辽宁省2017届高三下学期第四次联合模拟考试英语试卷 题型：完形填空
When I was walking through the forest, I heard someone weeping. I_______the sound of the soft cry until I saw a woman sitting on the snow. Her eyes were filled with tears for her heavy_______due to hard life. I sat on the cold snow with her and_______her my shoulder and my ears.
“What is your name?”, she asked. I smiled at her. _____, my name is Jane, but to comfort her, I said, “My first name is _____, my middle name is Hope and my last name is Compassion(同情) .” I saw a ______smile come upon her face as I asked her “what is your name?” “My name is Ann _____I had given up hope.” I read her a poem through which I_______the message of self-worth to her. Others will______us when we love ourselves. ______, it was important for one to have self- worth. After I shared the poem, we talked a while and then I picked a wild rose that was in the snow. It was _____that there was a wild rose in such weather. I placed the rose in her hand and a big ______appeared on her face. Then I felt kind of______at her change and handed her a piece of paper with my ____on it. I walked away. She called me cheerfully the next day and expressed her _____to me. She told me I truly ____my name. Obviously, she had found her faith, her hope and her compassion.
We all need someone in life to say I believe in you. _____is as rare as a rose in the snow. When you ____ it, don’t let it ever die. Life is too _____to thank all the people who have encouraged us. We should receive and give encouragement rather than let unimportant things stand _______our way.
1.A. heard B. followed C. reflected D. enjoyed
2.A. heart B. head C. body D. waist
3.A. shared B. brought C. fetched D. offered
4.A. Eventually B. Deliberately C. Actually D. Specially
5.A. Career B. Inspiration C. Motivation D. Faith
6.A. puzzled B. forced C. tired D. worried
7.A. but B. so C. because D. or
8.A. transformed B. left C. conveyed D. took
9.A. tolerate B. serve C. hate D. treasure
10.A. Therefore B. However C. Otherwise D. Moreover
11.A. usual B. rare C. frightful D. admirable
12.A. worry B. satisfaction C. smile D. shock
13.A. interest B. security C. disappointment D. relief
14.A. name B. number C. address D. photo
15.A. regret B. apology C. gratitude D. concern
16.A. lived up to B. looked up to C. came up to D. made up for
17.A. Pleasure B. Friendship C. Passion D. Encouragement
18.A. pas B. receive C. choose D. create
19.A. good B. slow C. short D. happy
20.A. in B. on C. by D. under
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科目：高中英语 来源：广西省桂林市2016-2017学年高二下学期期中考试英语试卷 题型：短文改错
文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧), 并在此符号下面写出该加的词。
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、只允许修改十处, 多者(从第11处起) 不计分。
It is Mother’s Day today. Though it’s a western festival, it’s popular in China now.
Mom has a full-time job, so she has to do most of the houseworks. She is a great mother. Both Dad or I planned to do something on Mother’s Day. We get up early in the morning. Dad cleaned the house, and then went on shopping. When he returned , I found a bunch of flowers in her hand. I asked Mom to stay in the sitting room and I cooked in kitchen. The dishes what I cooked were Mom’s favoritest. At dinner, we said to her, “Happy Mother’s Day!”Mom was grateful and moving.
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科目：高中英语 来源：福建省毕业班4月质量检查英语试卷 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。
增加：在缺词处加一个漏字符号（∧），并在此符号下面写出该加的词。
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。
Zhou Yan is the Senior Three student. Last week, he goes to see a doctor because of his arms and fingers hurt. The doctor told him the fact that had a “mobile phone disease”. Zhou sent messages for his friends with his mobile phone all the time, even in bed. Zhou started to do badly in all the exam because he spent so many time on his mobile phone. He didn’t stop use the mobile phone until his arms hurt. Yang Ling, which is an expert from a health center, said students should try to use their mobile phones less, especial at school.
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科目：高中英语 来源：福建省毕业班4月质量检查英语试卷 题型：阅读理解
After four silent years, British singer Adele Adkins finally introduced herself to the world again with Hello, the opening song from her third album 25, which came out on Nov. 20, 2015.
Although Adele is a very successful singer now, music wasn’t always what she saw herself doing. At age 10, when she saw her grandmother’s pain over the death of Adele’s grandfather, she pictured herself as a heart surgeon.
“I wanted to fix people’s hearts,” she told the UK music website i-D, remembering the childhood interest she’d had in biology classes until she found out that her real talent was for singing.
“Adele didn’t go to medical school, but many would agree that she still has healing (治愈)powers. Her songs find the kind of memory every listener holds somewhere in their heart. This kind of feeling is what people have always liked in Adele,” said The Telegraph. “She writes a pop diary, sharing the simple secrets of her heart.”
Most successful pop stars make albums at a fast pace, but not Adele. After her second album 21 won the 2012 Grammy Award for Album of the Year, she made it clear with her label that she would spend “four or five years” making her next album. She told magazine. “I won’t come out with new music until it’s better than 21.”
Instead of seeking fame, Adele remained silent and moved to the countryside. In her free time, she loved to watch TV series Teen Mom, American Horror Story, and The Walking Dead.
Living life as normally as possible is important to the singer’s art. “Nobody wants to listen to a record from someone who’ s not living in the real world,” Adele told i-D.“So I live a low-key life for my fans.”
1.What does die text mainly tell us?
A. The popularity of Adele’s album 25
B. The healing powers of Adele’s music
C. The secrets of Adele’s success in music
D. TV reason Adele’s becoming a singer
2.What does the underlined sentence in Paragraph 2 probably mean?
A. Adele wasn’t interested in music
B. Adele wasn’t good at music at first
C. Music wasn’t very important in Adele’s life
D. Music wasn’t all Adele wanted to be devoted to
3.Why doesn’t Adele want to make albums at a fast pace?
A. To live a low-key life
B. To win the Grammy Award
C. To guarantee the quality of her music
D. To share the secrets of her heart as a musician
4.What can we know about Adele?
A. Her album Hello will come out on Nov. 20
B. She has kept a diary since childhood
C. She moved to the countryside before 2012
D. Her works are based on real life
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科目：高中英语 来源：四川省2016-2017学年高二4月检测考试英语试卷 题型：阅读理解
Eight-year-old Owen Howkins suffers from growth delays(迟缓) and poor eyesight. This means that Owen needs a wheelchair to get around. Not surprisingly, he felt people were staring (盯着看) at him, and that made him very uncomfortable, so he became lonely and even stopped going outside of his house. That, however, was all before Haatchi came into his life!
Haatchi had a very unlucky start to life too. Tied to a railway track when he was just five months old, the dog was hit by a train. The hit unjured his tail and a leg so badly that both had to be cut off. Taken to a rescue shelter(救助站), the dog would have probably been killed if his story posted on Facebook had not been seen by Owen’s dad Will. He fell in love with Haatchi and decided to keep him, thinking that they were helping him. It turns out that it was Haatchi who helped them. By always staying at young Owen’s side, he became the boy’s best friend. Slowly Owen liked to go outside. Wherever he goes, the dog follows and protects him. Owen now proudly walks around the neighborhood, showing off his dog and telling anyone willing to listen, Haatchi’s story.
Haatch’s positive influence on the young boy has not gone unnoticed. In October 2012, the International Fund of Animal Welfare presented him with a special award(奖). The amazing friendship between the two has also been shown in a touching short film called “A Boy and His Dog” by students from the filmmaking class at the University of Hertfordshire. It has won several awards and had almost 2 million views. British best-selling author Wendy Holden has also writtern about this touching friendship in a aheartwarming children’s book, which was released on February 13th and had made Owen and Haatchi better known!
1.Owen didn’t like go out of his house mainly because_______.
A. he couldn’t walk outside by himself
B. he felt very lonely without any friend
C. he was very unhappy with his disease
D. he disliked other people’s unfriendly stares.
2.The underlined word “they” in the second paragraph refers to “_____”.
A. Will’s family B. Facebook users
C. the rescue shelter workers D. the friends from the neighborhood
3.Since Haatchi came into his life, Owen ________.
A. has more friends
B. has more confidence
C. has been growing taller and taller
D. had become a best-selling author
4.What can we learn about “A Boy and His Dog” ?
A. It is very popular
B. It was filmed by Will
C. It was first shown on February 13th
D. It made Wendy Holden better known.
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科目：高中英语 来源：河北省2017届高三（承智班）下学期（5-15）英语周练试卷 题型：阅读理解
Climate change will increase US wildfires,and the smoky air will cause terrible problems in areas far beyond those burned,reports an environmental group Thursday.
Two-thirds of Americans,or nearly 212 million,lived in states suffering from wildfire smoke three years ago,according to the report by the Natural Resources Defense Council(NRDC).These areas,which had smoke for at least a week,were nearly 50 times greater than those burned directly by fire.
“It affects a much wide area of the United States than people have realized.” says author Kim Knowlton,a Columbia University health professor,adding the smoke can move up to hundreds of miles.She says the smoke contains air pollution and can cause several kinds of diseases.
Texas was hit hardest in 2011,when smoke stayed for at least a week in areas that are home to 25 million people,according to NRDC’s report.Illinois,which recorded no wildfires within its borders,came second with
nearly 12 million people affected by smoke that moved in from elsewhere.The other eight states with the most people in touch with smoky air were,in descending order: Florida,Missouri,Georgia,Louisiana,Michigan,Alabama,Oklahoma and Iowa.
Nearly two dozen states had no wildfires within their borders in 2011,but eight of them still had at least one week of smoky air: Illinois,Missouri，Iowa,Kansas,Nebraska,Indiana,Wisconsin and Ohio.
Only 18 states and the District of Columbia had no people in touch with at least a week of smoke that year,although five of them—Alaska,California,Hawaii,Nevada and Utah—had a large area burned by wildfires.
The problem will only get worse.Knowlton says.Scientific research shows climate is causing higher temperatures and health problems.
1.We can learn from the first two paragraphs that_______.
A. climate change killed many Americans
B. there are fewer states burned by wildfires
C. every state had wildfire smoke for at least a week
D. most Americans suffered from wildfire smoke 3 year ago
2.Which of the following states had wildfires within its borders in 2011?
A. Iowa. B. Kansas.
C. Ohio. D. California.
3.The underlined word “descending” in the fourth paragraph probably means _______.
A. going down B. coming true
C. looking practical D. turning back
4.What is the text mainly about?
A. Climate change causes more wildfires.
B. Wildfire smoke becomes a serious health problem.
C. More wildfires cause climate changes.
D. Air pollution becomes a terrible problem.
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