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.show the blackground of the passage |
C.make an argument | D.introduce the topic of the passage |
A.people’s condition at birth | B.environmental pollution |
C.people’s bad living habits | D.heart disease and cancer |
A.the cement | B.the footprint |
C.the harmful effects | D.the genetic change |
A.The findings can’t help scientists to find ways to tell which people have heart disease. |
B.The findings have prevented more people from starting smoking. |
C.The findings offer evidence that a damaged gene can heal itself. |
D.The findings help scientists to find cures for genetic damage caused by smoking. |
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【推荐1】After his baby son lost his eye to retinoblastoma (视网膜母细胞瘤), this father found a way to save others from the same fate.
Like almost every set of new parents. Bryan and Elizabeth Shaw started taking pictures of their son, Noah, practically from the moment he was born. When he was about three months old, Elizabeth noticed something odd when she took his picture. The flash on their digital camera created the typical red dot in the center of Noah’s left eye, but the right eye had a white spot at the center, almost as if the flash was being reflected back at the camera by something.
When Elizabeth mentioned the strange phenomenon to their doctor, she shined a light into Noah’s eye, and saw the same white reflection, a tell-tale sign of retinal (视网膜的) cancer. After that, Noah received months of chemotherapy and radiation, but doctors finally could not save his eye.
Noah’s tumour (肿瘤) is treatable if caught early. Bryan Shaw couldn’t help but wonder whether there were signs he’d missed. He went back over every baby picture of Noah he could find and discovered the first white spot in a photo taken when Noah was 12 days old. “By the time he was four months old, it was showing up in 25 per cent of the pictures taken of him per month,” Bryan told People.
It was too late for Noah’s eye, but Bryan was determined to put his hard-won insights to good use, so he created a database that charted the cancer’s appearance in every photo. He also collected photos and data from eight other children with retinoblastoma. Armed with that data, he began to work with colleagues to develop a smartphone app that can scan the photos in the user’s camera roll to search for white eye and can be used as a kind of ophthalmoscope (检眼镜). Called White Eye Detector, it is now available for free on Google Play and in Apple’s App Store.
1. Which can be inferred from the passage?A.Noah’s discase was treatable when discovered. |
B.Noah got the discase when he was three months old. |
C.Noah’s parents failed to notice his symptoms at the beginning. |
D.Neither of Noah’s eyes could be saved for a delay in treatment. |
A.To create a photo scanner on the phone. |
B.To collect the data of children with the disease. |
C.To assess his hard-won insights into the disease. |
D.To use his knowledge to save others from the disease. |
A.To speak highly of father’s love. |
B.To introduce a type of eye cancer. |
C.To raise people’s awareness of eye protection. |
D.To report a father’s creation of an eye-saving app. |
【推荐2】I went to a New York Mets fantasy camp in 1995, an incredible experience. I was fortunate to be on a team whose pitching coach was Mel Stottlemyre, the former Yankees star pitcher(投手) and Mets and Yankees coach. I was upset when Mel died of cancer on Jan. 13, 2018, at the age of 77.
He was warm, friendly and treated us as if we were major leagues. He asked me whether I would like to pitch and showed me how to throw a “two-seamer”, a fastball that tends to sink, as well as a straight four-seam fastball. I knew that pitching was not for me. At age 45, my experience in organizing baseball was limited to a couple of years in Little League in the Bronx, and softball games as an adult. Mel eventually left the Mets and became the pitching coach for the Yankees. I followed his career and knew about his diagnosis of multiple myeloma(骨髓瘤), a blood cancer, in April 2000, and a stem cell transplant.
In the summer of 2002, I was diagnosed as multiple myeloma and was told that I needed a stem-cell transplant by the same group of doctors at Memorial Sloan Kettering Cancer Center that had treated Mel.
This shocked me, and frankly, I became quite depressed. I vowed that somehow I would try to speak to Mel. One day, my phone rang. Mel was calling from the Yankee' locker room. I asked him to tell me everything about his treatment. He spent 30 minutes generously explaining all the details. I hung on every word. He told me how well he was feeling and ended the conversation by giving me his home phone number! "I feel great, and I'm not retiring," he told me.
This incredible experience lifted my spirits. Every time I saw Mel during games on TV as I awaited my transplant, I repeated to myself, "Look at Mel. If he can do it, so can I."
1. Why did the author say he was lucky in Paragraph 1?A.He joined a famous team. |
B.He met an unusual coach. |
C.He was successfully cured. |
D.He was chosen as a pitcher. |
A.He was not skilled in pitching. |
B.He was a good baseball player. |
C.He called Mel for his treatment. |
D.He forgot what Mel had told him. |
A.23. | B.45. |
C.59. | D.6l. |
A.The Skills Taught by My Former Coach |
B.The Transplant Given by the Same Doctors |
C.My Baseball Team Helping Me Out |
D.My Coach's Spirits Shining on Me |
【推荐3】Despite the life-saving COVID-19 vaccines (疫苗), so many people died in the second year of the pandemic in the US that the nation’s life expectancy dropped for a second year in a row last year, according to a new analysis.
The analysis of government statistics found US life expectancy fell by just under half a year in 2021, adding to a dramatic drop in life expectancy that occurred in 2020. Dr. Steven Woolf, a professor of population health and health expert at Virginia Commonwealth University, who helped conduct the analysis, said many of the deaths occurred in people in the prime of their lives. And Woolf added that it drove the overall US life expectancy to fall to 76.6 years—the lowest in at least 25 years.
“Shame on the US,” said Noreen Goldman, a professor at Princeton University. The 2021 drop came after US life expectancy fell in 2020, dropping by almost two years. It’s unclear why this happened, but Woolf and others thought it may be due in part to some Americans more likely to live in states with fewer restrictions, so they let down their guard more, while often refusing to get vaccinated.
“The deaths that occurred in 2021 were a product not only of a lack of COVID-19 vaccines, which was a factor, but also being in places that didn’t observe policies like masking and social distancing that prevented spread of the virus, which was the main reason,” Woolf said.
The 2021 drop also widened the gap in life expectancy between the US and other countries, the analysis found. That was due primarily to lower vaccination rates in the US, researchers said. The researchers also said a big part of that was fewer restrictions and more vaccine hesitation in the US, which resulted in lower vaccination rates and a much higher death number. The other health problems like heart attack and overweight also played a role, they said.
“We spent a fortune on medical care and we’re a high-income country. Our government should be able to do far better,” Goldman said.
1. What was America’s life expectancy before COVID-19?A.About 79.1 years. | B.About 78.6 years. |
C.About 77.1 years. | D.About 76.6 years. |
A.Lack of medicine. | B.Powerful virus. |
C.Violation of anti-epidemic policies. | D.The government’s negative act. |
A.Politics. | B.Science. | C.Education. | D.Health. |
A.Unsatisfied. | B.Objective. | C.Supportive. | D.Unconcerned. |
【推荐1】What do you usually do when a flying insect lands on your arm? Most likely you blow it away. But what if that bug is a ladybug(瓢虫)? Then chances are that you would let it stay. What is it about ladybugs that we like?
Farmers once thought ladybugs were a good luck sign. A ladybug in the field meant that the crops(庄稼) would be successful and the weather would be good. The farmers may have been exaggerating(夸大) about what a very small bug can do, but in fact ladybugs do help out with the crops. They eat harmful insects.
Actually, it is not the adult ladybug that eats the other insects. It’s the ladybug larvae(幼虫). Ladybugs lay their eggs on leaves that are covered with aphids or other insects. When the larvae come out of the eggs, they are very hungry and will eat mites, aphids, mealybugs, green flies, and other crop-destroyers.
A single ladybug larva can eat over 1,000 aphids in one day. In the 1800s, ladybugs were brought all the way from Australia to California and set free among orange trees that were dying from being eaten by insects. The little red and black “eating machines” completely saved all the trees.
Ladybugs go about their daily business without worrying much about anything. Very few birds or insects will eat a ladybug because it gives off something that is dangerous to eat. Ladybugs also protect themselves by playing dead. They fall off leaves and remain very still until their enemy goes away.
So next time you see a ladybug, think about what it may be up to. Maybe it is off to save an orange tree. Maybe its next move will be to fall off a leaf and play dead or stand up to a bird about 100 times its size. Maybe it’s letting you know that the weather will be good tomorrow. Who knows? Ladybugs are special.
1. What do we know about mites and aphids?A.They do harm to the crops. | B.They eat more than they should. |
C.They are food for adult ladybugs. | D.They are the enemy of ladybug larvae. |
A.Play with. | B.Worry about. | C.Get along with. | D.Fight back against. |
A.It is a crop-destroyer. | B.It is a good luck sign. |
C.It is a little flying helper. | D.It is a big eating machine. |
【推荐2】Widespread descriptions of animals in pop culture could actually be hurting the animals’ survival chances in the wild, new research suggests.
Franck Courchamp of the University of Paris-Sud was interested in the idea of “appeal” in animals. He wanted to know: What species do people consider appealing? And what are the influences of being appealing on populations in the wild?
In a research published this month, Courchamp and other researchers list the top twenty appealing species. Most of the animals identified as appealing are large mammals living on land. Coming in first place were tigers, followed by lions, elephants, giraffes, panthers, pandas, cheetahs, polar bears, wolves, and gorillas. However, at least half of the interviewees didn’t realize that five of the top ten most appealing species are threatened. It is contradictory that we haven’t been able to protect the species we care about the most.
The study also found that we are flooded with images of these creatures, even as they are becoming fewer in the wild. The study suggests that too much of imagination might be creating a “virtual population” of the animals in people’s minds, making them believe there are far more individuals in the wild than is exact.
The study suggests that companies benefiting from the use of these images should set aside a small percentage of their profits for protection efforts and information al campaigns. “That would be not only something fair, but that would be something that could bring a win-win situation for them,” Courchamp says. “It could bring them positive public relation, for instance. Besides, if a company’s mascot (吉祥物) goes extinct, that could hurt them from a marketing point. But not enough companies are “truly concerned about the protection of the species that they work on,” he adds.
1. What is the influence of the widespread images of animals in pop culture?A.It raises people’s wildlife protection awareness. |
B.It does good to the survival of appealing animals. |
C.It makes a false impression of the animals’ real situation. |
D.It brings a win-win situation for both animals and companies. |
A.It is natural to regard the large mammals as attractive. |
B.More than half of the top ten appealing species are protected. |
C.It is strange that people’s thoughts contrast with their behavior. |
D.It is terrible that the species are dying out at an alarming speed. |
A.By giving examples. | B.By using numbers. |
C.By making definitions. | D.By making comparisons. |
A.Unconcerned. | B.Positive. | C.Supportive. | D.Dissatisfied. |
Most parents these days have to rely on their force of personality and whatever love and respect they can inspire to exert any influence over their children at all, but there is still an awful lot of parental authority that big money can buy. Multi- millionaires have more of everything than ordinary people, including more parent power, and their sons and daughters have about as much opportunity to develop according to their own inclinations(意向) as they would have had in the age of absolute monarchy (君主专制) .
The rich still have families. The great divide between the generations is the state of the lower and middle classes, whose children begin to drift away as soon as they are old enough to go to school. The parents cannot control the school, and have even less say as to what company and ideas the child will be exposed to; nor can they isolate him from the public mood, the spirit of the age. It is an often heard complaint of the middle-class mother, for instance, that she must let her children watch television for hours on end every day if she is to steal any time for herself. The rich have no such problems; they can keep their offspring busy from morning to night without being near them for a minute more than they choose to be, and can exercise almost total control over their environment.
As for schooling, they can handpick tutors with sound views to come to the children, who may never leave the grounds their parents own, in town, in the country, by the sea, unless for an exceptionally secure boarding school or a well- chaperoned (伴护着的) trip abroad. It would have been easier for little Marianne Montgomery to go to Cairo than to the nearest newsstand.
1. The author implies that Marianne Hardwick’s timidity were closely associated with ______.
A.the inborn characteristics of the weaker sex |
B.the conditions where she was brought up |
C.the consumption of her energy |
D.her physical activity and longing |
A.Rich girls always share their ideas with their grandmothers. |
B.Wealthy children learn at home instead of going to school. |
C.Middle-class mothers usually steal time for their children. |
D.Rich parents may have more control over their children than the middle-class parents do |
A.They did not have up-to-date ideas. |
B.They were unintelligent. |
C.They did not have much freedom. |
D.They had no physical activity. |
A.little opportunity to develop according to their own inclinations |
B.absolute opportunity to develop according to their own inclinations |
C.more opportunity to develop according to their own inclinations than ordinary children |
D.as much opportunity to develop according to their own inclinations as ordinary children |
A.The rich control their children's lives without being near them. |
B.The generation gap only occurs in the lower and middle classes. |
C.Rich parents have more authority over their children than poor parents. |
D.Rich girls who are being overprotected by their parents are rather dependent. |
For many centuries, people used windmills to grind (磨碎) wheat into flour or pump water from deep underground. When electricity was discovered in the late 1800s, people living in remote areas began to use them to produce electricity. This allowed them to have electric lights and radios. However, by the 1940s when electricity was available to people in almost all areas of the United States, windmills were rarely used.
During the 1970s, people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity. People realized that the supply of coal and gas would not last forever. Then, wind was rediscovered, though it means higher costs. Today, there is a global movement to supply more and more of our electricity through the use of wind.
1. From the text we know that windmills _______.A.were invented by European armies |
B.have a history of more than 2,800 years |
C.have rarely been used since electricity was discovered |
D.used to supply power to radio in remote area |
A.making something cleaner |
B.making something flow freely |
C.making something flow in a particular direction |
D.making something into small parts |
A.it is one of the oldest power sources |
B.wind power is cleaner |
C.it was cheaper to create energy from wind |
D.coal and gas failed to meet the needs |
A.The global trend towards producing power from wind. |
B.The design of wind power plants. |
C.The worldwide movement to save energy. |
D.The advantages of wind power. |
Five star fathers and their children travel around China, riding camels through the western deserts, fishing off the east coast, and selling vegetables for their bus fare home in southwestern Yunnan province. One dad doesn’t know how to do his daughter’s hair, but give him a couple of days — he’ll figure it out. Another one must survive with his son for three days in the desert, where, because neither can cook, the two only eat instant noodles.
These story lines are part of Where Are We Going, Dad? which, since its first show in October, has become one of China’s most popular television shows, covering more than 600 million viewers each week. And searches for Where Are We Going, Dad? turn up over 40 million hits on Sina Weibo, China’s Twitter.
“In traditional Chinese culture, the common conception of parenthood is that the father is strict and the mother is kind. But on the show, we see fathers who are much gentler on their kids and more concerned with their upbringing,” said Li Minyi, an associate professor of early childhood education at the leading Beijing Normal University. “An important question arises in this show for modern Chinese society — what is the role of fathers in today’s China?”
“As they raise their children, parents are growing up at the same time,” said Wang Renping, a popular education expert. “They cannot use parenting styles from 20 years ago to guide the development of children born 20 years later.”
The attraction of Where Are We Going, Dad? lies in the chance to have a close look at the lives of popular Chinese stars and their children. Audiences like watching the failed attempts of star dads making dinner, braiding hair(编头发), and disciplining children — tasks often left to mothers in a society still influenced by the opinion that “men rule outside and women rule inside.”
1. From the passage, we can draw a conclusion that Where Are We Going, Dad? is _____.
A.a match | B.a novel |
C.a TV show | D.a news report |
A.how the fathers do housework at home |
B.how the children study in their spare time |
C.how the fathers look after and guide their children |
D.how the children and their father travel around China |
A.In modern society, men should not care too much about their kids |
B.Where Are We Going, Dad? has the most number of viewers in China |
C.In Chinese tradition, fathers always play an active part in their children’s lives |
D.While they bring up their children, parents are improving their parenting styles |
A.audiences enjoy laughing at others’ failure in life |
B.it can make people laugh and think at the same time |
C.people love watching the stars and their children’s lives closely |
D.it presents a new generation of men’s role in their children’s lives |
【推荐3】Dennis Prescott, a famous Canadian chef and cookbook author, understands the very essence of cooking. His practice is based on making people happy with food that inspires joy at the table. Naturally, it took Prescott time and work to achieve a level of freedom and joy in the kitchen.
As a struggling musician living in Nashville, TN, he learned how to cook by working his way through several Jamie Oliver cookbooks. But he soon realized that food, rather than music, was his actual passion and he threw himself into creating delicious recipes. Working alongside chefs in various restaurants leads him to travel the world as a chef and finally become the master he is today.
“Mastery takes years,” stresses the chef. “The best chefs in the world are the best because they’ve put years of work to get to a place where something comes naturally to them like second nature. And they still fail often, because they’re constantly pushing their own creativity in the kitchen.”
Besides the actual cooking, Prescott’s success is also owed to his online presence. His Instagram account is full of photos of mouth-watering food and appealing recipes that will inspire you, at the very least, to order some takeout. “When I started, I simply thought all I’d have to focus on was food,” he says. “Wrong. Should you aspire to be the best chef? Absolutely! That said, I spend much more time working on account receivables and on meetings than I do in the kitchen.”
When asked what is his advice to other aspiring cooks, he said, “There is no special pill or secret to success. Just put your head down, work hard and put in the time. In the end, the risk will pay off.”
1. How did Prescott learn to cook at first?A.By copying other cooks on social media. | B.By learning cooking skills from cookbooks. |
C.By doing cooking in various restaurants. | D.By getting special recipes from a musician. |
A.They work years to avoid failure. | B.They have second nature to be cooks. |
C.They are creative and practice constantly. | D.They usually have their own kitchen. |
A.Spending time on account receivables. | B.Ordering some takeout online. |
C.Longing to be the best chef. | D.Focusing all on food. |
A.They should face up to failure. | B.They should seek the secret of recipes. |
C.The practice of cooking should come first. | D.Cooking should be combined with music. |