Smoking is harmful. But as soon as you quit the habit, everything will be OK, right?
Wrong.
New research has found that even if you give up smoking, the damage it has done to your genes (基因) will stay there for a much longer time.
In the research, a team of US scientists studied the blood of 16,000 people. Among them, some were smokers, some used to smoke, and the rest were non-smokers. Scientists compared their genes and found that more than 7,000 genes of smokers had changed--a number that is one-third of known human genes.
According to NBC News, both heart disease and cancer are caused by genetic changes. Some people may have had the changes when they were born, but most people get them in their day-to-day lives while doing things like smoking.
When you stop smoking, a lot of these genes will return to normal within five years.
This means your body is trying to heal (治愈) itself of the harmful effects of smoking. But the changes in some of the genes stay for longer. They can stay for as long as 30 years, It’s almost like leaving a footprint on wet cement (水泥) --it will always be there, even when you’ve walked away and when the cement becomes dry.
Although the study results may make people unhappy, there is a bright side: the findings could help scientists invent medicine to treat genetic damage caused by smoking or find ways to tell which people have heart disease or cancer risks.
1.The function of Paragraph 1 is to_________ .
A. give an example B. introduce the topic of the passage
C. make an argument D. show the main idea of the passage
2.Most genetic changes happen because of___________ .
A. people’s condition at birth B. environmental pollution
C. people’s bad living habit D. heart disease and cancer
3.The underlined word “it” in Paragraph 6 refers to__________ .
A. the footprint B. the cement
C. the harmful effect D. the genetic change
4.Which of the following statements is true?
A. The findings are the fruit of more than three years’ research.
B. The findings help to find cures for genetic damage caused by smoking.
C. The findings offer evidence that a damaged gene can heal itself.
D. The findings have prevented more people from starting smoking
年級(jí) | 高中課程 | 年級(jí) | 初中課程 |
高一 | 高一免費(fèi)課程推薦! | 初一 | 初一免費(fèi)課程推薦! |
高二 | 高二免費(fèi)課程推薦! | 初二 | 初二免費(fèi)課程推薦! |
高三 | 高三免費(fèi)課程推薦! | 初三 | 初三免費(fèi)課程推薦! |
科目:高中英語 來源:河北省邢臺(tái)市2016-2017學(xué)年高一下學(xué)期第一次月考英語試卷(有答案) 題型:閱讀理解
Every morning,many girls in the African country of Zimbabwe rise with the sun and go to fetch water
for their families.They have to walk many miles an carry the water home on their heads. Where they live,there is no running water they can get at all.
“You have to relax your neck and head and make it follow the load(負(fù)荷),”one girl told me ,“It is easy for you to do that if you practice for many times.” I have lived in Zimbabwe all my life.But I had never tried to balance a pot on my head.I have made efforts many times and I have also practiced it for long.But it was not east at all.I managed to walk only several yards before the pot fell off my head.The girls watching covered their mouths and laughed at my poor head-balancing skills.
In reality,water is not the only thing that requires head-balancing skills in everyday life.In most of these villages,there is no electricity for cooking,so fire wood is used instead.The girls must collect and carry it back to their villages.They insist the easiest way to do this is on their heads.
Even at school,head-balancing skills come in handy.At a school,I saw a group of girls fetching bags of sand that were to be used to build a new classroom.They carried these bags with ease.When I tried,I could not beat the weight.
Girls in many countries worldwide prefer to carry things on their heads.They are taught this skill at a young age and grow up to have strong necks and great posture.For these girls,balance is simply a way of life.
1.According to the text,Zimbabwe girls _______.
A. go to fetch running water for money
B. catty water every evening
C. do pleasant jobs in their family
D. like carrying things on their heads
2.To get the head-balancing ability,a girl should _______.
A. have a short neck B. take a light load C. practice many times D. cover her mouth
3.Why do the girls have good head-balancing skills?
A. Their necks are strong and their heads are round.
B. They are farced to carry things on their heads.
C. They find no other ways to carry things.
D. They have learned them since they were young.
4.What is the best title of the text?
A. A special living ability
B. Girl’s head-balancing skill
C. Carrying things from far away
D. Using our heads in different ways
查看答案和解析>>
科目:高中英語 來源:遼寧省鞍山市2017屆高三3月月考英語試卷(有答案) 題型:短文填空
In 1931, I was born disabled. I couldn’t 1.(straight) my legs. Dad would carry me when we went into town. Once 2.he was holding me, I told him I wanted to be a football player. He said, “I don’t think you are going to be much of3.unique athlete.” This was my motivation for years4. (come). I had outgrown(因長大而不再)my disability by the time I was 9, 5.I weighed only 40 pounds and needed to build muscle and strength.
I knew that a bicycle would help. I bought6.at the local shop and started riding it to school. By the time I was 13, I7.(become) the fastest runner in grade school, and at 15, I was the fastest runner in high school.
I made farmwork a part of my recovering routine. I 8.work in the fields at 7:30 p. m. and then run two miles. Picking up wheat was a big thing but I did it all by hand. Finally, all the trainings9.off and now I am working as a public speech maker giving courses10.disability recovering.
查看答案和解析>>
科目:高中英語 來源:江西省2016-2017學(xué)年高二下學(xué)期(第五次)月考英語試卷試卷 題型:短文填空
閱讀下面材料,在題后空白處填入適當(dāng)?shù)膬?nèi)容(1個(gè)單詞)或括號(hào)內(nèi)單詞的正確形式。
Louis Armstrong, the most influential jazz musicians, is considered great not only because of his1. (achieve) but also because of his personalities.
2.(bear) in a poor family in New Orleans in 1901, instead of3.(commit) crimes to get money like some boys in his situation, Louis would sing on the streets in order to earn a few cents from4.(passer-by).However, at the age of 12, Louis was arrested because of firing a gun into the air at a New Year’s Eve party.In a school of problem boys, he was taught to play drums and the trumpet,5. enabled him to find work related with music after he left the school.A well-known musician Joe “King” Oliver noticed Louis and began to teach him about jazz.When Oliver left New Orleans in 1917,Louis took 6.his job in one of the best bands in town.
After becoming famous, Louis would introduce his particular style of jazz to enthusiastic audiences while 7.(travel) around the United States as well as Europe.Apart from being a famous jazz musician, he was also an unofficial goodwill ambassador who spoke8.(public) about the rights of black people in America. Despite the fact9.he became rich and famous, Louis Armstrong continued to live a simple live in a working-class neighbourhood.He continued playing and recording until July 6th, 1971, when he died in his sleep at his home in New York.He is still remembered as the most10.(distinguish) musician in the early history of jazz.
查看答案和解析>>
科目:高中英語 來源:2016-2017學(xué)年湖北省宜昌市高一3月月考英語試卷(解析版) 題型:書面表達(dá)
最近,你校英文報(bào)在舉辦主題為“Exercise an hour every day,healthy life for a lifetime.”的征文活動(dòng)。假定你是李華,請(qǐng)根據(jù)以下內(nèi)容用英語寫一篇短文。
1.你對(duì)征文主題的理解;2.你喜歡的運(yùn)動(dòng)項(xiàng)目及活動(dòng)情況;3.該運(yùn)動(dòng)給你生活和學(xué)習(xí)帶來的益處。
注意: 1.詞數(shù)100左右;2.可以適當(dāng)增加細(xì)節(jié),以使行文連貫。
3.開頭語已寫好,不計(jì)入總詞數(shù)。
Nowadays,having sports is becoming more and more popular._____________________________
____________________________________________________________________________________________________________________________________________________________
查看答案和解析>>
科目:高中英語 來源:2017屆河南省天一大聯(lián)考高三階段性測試(四)(B卷) 英語試卷(解析版) 題型:短文改錯(cuò)
假定英語課上老師要求同桌之間交換修改短文,請(qǐng)你修改你同桌寫的以下作文,文中 共存10處語言錯(cuò)誤,每句中最多有兩處,每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。
增加:在缺詞處加一個(gè)漏字符號(hào)(∧),并在其下而寫出該加的詞。
刪除:把多余的詞用斜線 (\) 劃掉。
修改:在錯(cuò)的詞下面畫一橫線,并在其下面寫出修改后的詞。
注意:1. 每處錯(cuò)誤及其修改均僅限一詞;
2. 只允許修改10處,多者(從第11處起)不計(jì)分,
When I was having lunch in a restaurant, I noticed a young man. Dressing in black, he was playing with a smartphone while eating. She smiled at everyone that walked by. All of a sudden, a boy ran into him, making some food dropping on his trousers, what I thought would make him annoyed with the boy. Instead, he laughs it off when the mother made the apology to him. “Never mind!” he said polite. Seeing this, I touched and appreciated the kindness he brought to the world. On the way out, I handed to him a Smile Card which said, “Best wish and good luck to you!”
查看答案和解析>>
科目:高中英語 來源:2017屆河南省天一大聯(lián)考高三階段性測試(四)(B卷) 英語試卷(解析版) 題型:閱讀理解
Festival of Light, Longleat Safari Park, Wiltshire
Longleat is celebrating its 50th anniversary this year. Giant lanterns take the shape of some of the park’s animals, and there are also lots of characters in Beatrix Potter’s book, such as Peter Rabbit, Jemima Puddle-Duck, Squirrel Nutkin, to mark the 150th anniversary of the author’s birth. There is also a 20-metre-high birthday cake.
•£ 27.85, adult/£ 20.65, child/under-threes, free.
•15 Dec. to 2 Jan.
Festival of Light, Enchanted Park, Gateshead
Enchanted Park is an interactive walk through Saltwell Park, just south of the town centre, along a trail (小徑) of light with performances and sculptures. The story being told is a Midwinter Night’s Tale, inspired by the 400th anniversary of William Shakespeare’s death. Visitors can join stories and songs with Santa, and attend decorating workshops.
•£ 8, adult/£ 2, child/under-fours, free.
•11 ~27 Dec.
Christmas Glow, RHS Wisley, Surrey
The garden is glowing with giant lighted flowers. Some of the trees are brilliant, too. The glasshouse is decorated like a gingerbread house, and displays (陳列) seasonal plants. There are lanterns around the lake. The cafe serves hot chocolate and apple juice.
•£ 9.90, adult/£ 3.60, child.
•20 Dec. to 2 Jan.
Christmas at Kew Gardens, London
Kew is a special place to visit at any time of the day or year, but the festive light show gives it a magical twist, as the mile-long trail through the garden is decorated with 60,000 lights. Some of the garden’s oldest and tallest trees are also beautifully lit along the way.
•£ 16, adult/£ 10, child/£ 48, family/under-fours, free.
•24 Dec. to 2 Jan.
1.What can people do in Enchanted Park?
A. Visit Shakespeare’s house. B. Listen to stories.
C. Leapt to create sculptures. D. Play the part of Santa.
2.Which place will attract children fond of fictional animal characters?
A. Kew Gardens. B. RHS Wisley. C. Enchanted Park. D. Longleat Safari Park.
3.How much is the admission to Kew Gardens for Mr. Green and his 3-year-old child?
A. £ 16. B. £ 10. C. £ 26. D. £ 48.
4.What do the parks mentioned in the text have in common?
A. Their open times are the same. B. They serve free cakes to children.
C. They are full of Christmas atmosphere. D. They are free for children under four.
查看答案和解析>>
科目:高中英語 來源:2016-2017學(xué)年安徽省馬鞍山市高一下學(xué)期開學(xué)考試英語試卷(解析版) 題型:閱讀理解
February 14th is Valentine’s Day! In China, it is only a day for young boyfriends and girlfriends. But my teacher and friends in America told me that Valentine’s Day is a public day.
This was my first Valentine’s Day in America. I didn’t understand the customs(風(fēng)俗) clearly. Maybe I didn’t need to send any gifts. I watched others to see what they did, so next time I can understand.
On that day, when we began the reading class, Mr. Peters gave every student some chocolates and said, “Happy Valentine’s Day!” I was very happy the teacher gave his students gifts and blessings. I never saw that in China. Maybe American teachers are very different. I didn’t buy a gift for the teacher, so I owed(欠) a gift to the teacher. Anyway, I want to say, ”Thank you, Mr. Peters, and I’m sorry.”
When we had a break, one of my classmates gave me a Pokemon card. It was very funny and I felt thankful, but I thought I owed a gift again.
When we were coming to our grammar class, suddenly I heard someone calling me. ”Shelly!” I stopped. Another classmate who had only been in our class one day gave me some chocolates. She said, “These are for you and your friends. Have a good day!” I was looking at her leaving and thinking that we were in the same class only one day, but now we are friends. That’s very great, but I owed a gift again.
When I came home, my Chinese friend sent some roses and chocolates. I was surprised and happy because I had never received roses in my past life, but I hoped it was the last gift. I didn’t want to owe more gifts.
1.Before the writer left China, she thought Valentine’s Day _______.
A. was a day for the young
B. was different in America
C. was a festival for all the people
D. was a holiday for the students
2.By saying “I never saw that in China,” the writer would like to tell us that in China _________.
A. the students gave gifts to the teachers
B. the teachers didn’t like the students at all
C. the students never received any gifts and blessings
D. the teachers wouldn’t give their students any gifts
3.The writer felt sorry probably because she ________.
A. made a mistake in class
B. didn’t like chocolate
C. had no gift for Mr. Peters in return
D. had no money to buy gifts
4.What was the first gift the writerreceived from his classmates?
A. A toy. B. A card. C. Some chocolates. D. Some roses.
查看答案和解析>>
科目:高中英語 來源:陜西省2016-2017學(xué)年高一下學(xué)期第一次月考(3月)英語試卷 題型:單項(xiàng)填空
----Must I get through the business in one evening?
----No, you ________.
A. mustn’t B. haven’t C. needn’t to D. needn’t
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報(bào)平臺(tái) | 網(wǎng)上有害信息舉報(bào)專區(qū) | 電信詐騙舉報(bào)專區(qū) | 涉歷史虛無主義有害信息舉報(bào)專區(qū) | 涉企侵權(quán)舉報(bào)專區(qū)
違法和不良信息舉報(bào)電話:027-86699610 舉報(bào)郵箱:58377363@163.com