14 days. That’s the time Chinese scientists took to identify the full genetic sequence of the novel coronavirus (新冠病毒) since its outbreak. It was shared with the WHO immediately, and has now become an important foundation for global researchers in the fight against the COVID-19. But first, let us turn the clock back 17 years, when it took months to identify the SARS virus. From months to 14 days, what changed? It turns out AI played an important part.
The scientists first obtained bronchoalveolar lavage (BAL) fluid (支气管扩张灌洗液) samples from patients, isolated (分离) the DNA and RNA, then sequenced the genetic material by comparing them. AI’s advantage is its ability to recognize patterns among a flood of data.
Let me put it in a simple way. Sequencing the coronavirus genome (基因组) is similar to looking for a needle in a haystack (干草堆)---looking for genotypes (基因型) with specific characteristics from a huge gene pool. That’s where search algorithm (算法), a branch of modern AI, comes in. Think of it as an efficient search engine, which can find the needle in the haystack. This search algorithm can shorten months-long genetic sequencing to weeks or even just a few days. Combined with macro-genomic sequencing and a virus library, this AI technology can also be used in tracking virus mutation (突变).
AI doesn’t just support scientists. It can also help patients by improving the efficiency of diagnosis (诊断). China launched a Genomics Service, which can run multiple virus gene comparisons and produce a detailed report within 60 seconds. This algorithm has been put into use in China and shared to the world for free.
1.AI’s advantage is that it can ________.
A.slow down the spread of coronavirus B.separate DNA from RNA
C.identify specific genotypes rapidly D.obtain samples from patients quickly
2.The search algorithm helps shorten the time of genetic sequencing by __________.
A.finding a needle in a haystack B.serving as a search engine
C.combining with a virus library D.tracing virus mutation
3.What do we know about the Genomics Service in the last paragraph?
A.It has been widely used in the world. B.It is mainly based on blood test.
C.It is for fast diagnosis of COVID-19. D.It is used to track COVID-19 patients.
4.What’s the best title of the passage?
A.14 Days---China Made it! B.AI Assists in COVID-19 Fight
C.Search Algorithm, Best Choice D.China’s Genomics Service
As a child, I never imagined that one day a man would walk on the moon. Yet this year we marked the 50th anniversary of the famous Apollo 11 mission. As those historic pictures were beamed (传递) back to Earth, millions of us sat transfixed (使…呆住) to our television screens, as we watched Neil Armstrong taking a small step for man and a giant leap for mankind---and, indeed, for womankind. It’s a reminder for us all that giant leaps often start with small steps.
This year we marked another important anniversary: D-Day. On 6th June 1944, some 156,000 British, Canadian and American forces landed in northern France. It was the largest ever seabourne invasion and was delayed due to bad weather. I well remember the look of concern on my father’s face. He knew the secret D-Day plans but could of course share that burden with no one.
For the 75th anniversary of that decisive battle, in a true spirit of reconciliation (和解), those who had formally been sworn enemies came together in friendly commemorations (纪念) either side of the Channel, putting past differences behind them. Such reconciliation seldom happens overnight. It takes patience and time to rebuild trust, and progress often comes through small steps.
Since the end of the Second World War, many charities, groups and organisations have worked to promote peace and unity around the world, bringing together those who have been on opposing sides. By being willing to put past differences behind us and move forward together, we honour the freedom and democracy (民主) once won for us at so great a cost.
The path, of course, is not always smooth, and may at times this year have felt quite bumpy, but small steps can make a world of difference. And, as we all look forward to the start of a new decade, it’s worth remembering that it is often the small steps, not the giant leaps, that bring about the most lasting change.
And so, I wish you all a very happy Christmas.
1.Who does the “I” in the passage probably refer to?
A.Neil Armstrong. B.Winston Churchill.
C.Queen Elizabeth Ⅱ. D.Donald Trump.
2.What does the underlined word “bumpy” mean in the fifth paragraph?
A.Smooth. B.Rough. C.Flat. D.Straight.
3.The passage might be a speech on _______.
A.Christmas Day B.New Year’s Eve
C.the anniversary of D-Day landing D.Victory in Europe Day
4.What is the purpose of the passage?
A.To honour the achievements of moon-landing.
B.To remember the victory of D-Day landing.
C.To promote reconciliation across the Channel.
D.To urge efforts for a world of peace and unity.
He ran between two defenders, past a third, and a couple of seconds later his team had two more points. At the end of his final game, on April 11, he had scored 30 points.
This was the end of a career for Dwyane Wade, nicknamed “Flash”. It was the 37-year-old’s last game for the Miami Heat and his last appearance on an NBA basketball court. Over his storied career, Wade played in 1,054 regular-season games and 177 post-season games, scored more than 23,000 points, appeared in three NBA championships and earned one Finals Most Valuable Player (MVP) award.
Coming from Chicago, Wade’s attitude and style of play moved many people, including former US President Barack Obama. “Whenever you got knocked down, you always showed us how to get back up,” Obama said in a tribute video. “You showed some Chicago spirit... and you did us proud.”
Wade broke down the door to the NBA in 2003 with his outstanding ball-handling skills and jumping ability. He had a strong principle, taking practice as seriously as he took games. He trained in the gym by himself during the off-season and exercised hard to stay in shape.
Wade has also spoken out on social issues. In 2012, 17-year-old Heat fan Trayvon Martin, an African-American, was shot in a racist attack on his way home from watching the NBA All-Star Game. Wade, together with LeBron James, led the Miami Heat squad, pulling up their hoodies (连帽衫) in support of justice for Martin, who had his hoodie up when he was killed. Wade hoped this action would bring attention to racist violence.
In 2003, he founded the Wade’s World Foundation, which provides support to various education, health, and family service programs. “Obviously, I’m one person. I can’t change the world, but I can help affect change in communities,” Wade told ESPN. “That’s what I want to continue to do.”
This is not the end of Wade’s story. He wants to continue fighting for economic and social equality in the US.
1.How many games did Wade play in his professional career?
A.1,054. B.177. C.23,000. D.1,231.
2.Wade was thought highly of by Obama because of _____________.
A.his strong willpower B.his flexible playing style
C.his extraordinary skills D.his honourable ambition
3.Why did Wade and his teammates pull up their hoodies?
A.To follow Martin’s heroic behaviour. B.To speak out for Martin.
C.To try on the latest fashion. D.To show racial equality.
4.This passage is mainly about Wade’s _________.
A.outstanding professional career B.legendary life experiences
C.achievements in social equality D.influence in sports and society
The Four Famous Embroideries (刺绣) of China refer to the Xiang embroidery in Hunan Province, Shu embroidery in Sichuan Province, Yue embroidery in Guangdong Province and Su embroidery in Jiangsu Province.
Xiang embroidery
The earliest piece of Xiang embroidery was unearthed at the No. 1 Tomb of Mawangdui, Changsha City of the Han Dynasty (206 B.C. —A.D. 220). The weaving technique was almost the same as the one used in modern times, which shows that embroidery had already existed in the Han Dynasty. In its later development, it absorbs the characteristics of traditional Chinese paintings and reaches a high artistic level. Xiang embroidery crafts include valuable works of art, as well as products for daily use.
Shu embroidery
Shu embroidery has formed its own unique characteristics: smooth, bright, neat, etc. The works choose flowers, animals, mountains, rivers and human figures as their themes. The craftsmanship of Shu embroidery involves a combination of fine art and practical uses, such as the facings of quilts, pillowcases, coats and screen covers.
Yue embroidery
Influenced by national folk art, Yue embroidered pictures are mainly of dragons and phoenixes (凤凰), and flowers and birds, with neat designs and strong, contrasting colors.
Gold-and-silk thread embroidery is widely used, even for crafts of daily use.
Su embroidery
The weaving techniques of Su embroidery are characterized by the flat surface, dense lines, even pictures and harmonious colors. Su embroidery products fall into 3 major categories: costumes, decorations for halls and crafts for daily use. Double-sided embroidery is an excellent representative of Su embroidery.
1.The unearthed embroidery at Mawangdui shows Xiang embroidery’s _______.
A.time-honoured history B.excellent designs
C.artistic value D.advanced techniques
2.If you receive a double-sided embroidery as a gift, it must be ________.
A.Xiang embroidery B.Shu embroidery
C.Yue embroidery D.Su embroidery
3.What do we know about the four famous embroideries?
A.All are rooted in folk art. B.All are valuable artworks.
C.All share the same themes. D.All have practical use.
请认真阅读下面关于我国某市近五年国产手机和苹果手机的市场销量占比的调查图表及相关文字，并按照要求用英语写一篇150词左右的文章．
| Li Jiang： Hello， Su Hua! What a coincidence meeting you here! What are you going to do？ Su Hua： Well， I lost my phone several days ago and I've just come here to buy a new one． Li Jiang： I'm sorry to hear that． But I heard that the Apple iPhone XR and Apple iPhone 11 Pro Max are available， why don't you go to have a look？ Su Hua： I just went to an Apple Store． However， to tell you the truth， I prefer Huawei to an iPhone． They are really cool and fashionable |
[写作内容]
1．用约30个单词概述曲线图信息的主要内容；
2．简要谈谈手机销量占比产生上述变化的原因（上述对话仅供参考，原因不少于两点）；
3．谈谈你对国产手机市场销量走向的看法，并简要说明理由．
[写作要求]
1．写作过程中不能直接引用原文语句；
2．作文中不能出现真实姓名和学校名称；
3．不必写标题；
[评分标准]
内容完整，语言规范，语篇连贯，词数适当．
Is True Friendship Dying Away
Just as our daily life is becoming more technologically connected， we are losing other more meaningful relationship．
To anyone paying attention these days， it's clear that social media ﹣﹣ whether Twitter， Facebook， or Iinkedln﹣﹣ are changing the way we conduct relationship． Face﹣to﹣face chatting is giving way to texting and messaging； people even prefer these electronic exchanges to， for instance， simply talking on a phone． Among these smaller trends， growing research suggests we could be entering a period of crisis for the entire concept of friendship． Where is all this leading modern﹣day society？ Perhaps to a dark place， a lonelier society where electronic craze slowly replaces the joys of human contact．
Typically， the pressures of urban life are blamed． Witness crowded bars and restaurants after work： We have plenty of acquaintances， though perhaps few individuals we can turn to and share close relationships． American sociologists have tracked related trends on a broader scale， well beyond the urban jungle． According to work published in the American Sociological Review， the average American has only two close friends， and a quarter don't have any．
While social networking sites and the like have grown dramatically， the crucial element is the quality of the connections they establish． A connection may only be a click away， but establishing a good friendship takes more． It seems common sense to conclude that "friending" online brings about shallow relationships as the term "friending" itself implies．
No single person is at fault， of course． The pressures on friendship today are broad． They arise from the demands of work， or a general busyness that means we have less quality time for others． How many individuals would say that friendship is the most important thing in their lives， only to move thousands of miles across the continent to take up a better﹣paid job？
Of course， we learn how to make friends or not in our childhood． Recent studies on childhood and how the contemporary life of the child affects friendships are illuminating （启示）． A central conclusion often reached relates to a lack of what is called "unstructured time"． Structured time results from the way an average day is arranged for our kids time for school time for homework， time for music practice， even time for play． Yet too often today， no period is left unstructured． After all， who these days lets his child just wander off down the street？ We simply "hang out"， with no tasks， no deadlines and no pressures． It is in those moments that children and adults alike can get to know others for who they are in themselves．
Aristotle had an attractive expression to capture the thought： close friends， he observed， "share salt together．" It's not just that they sit together， passing the salt across the meal table． It's that they sit with one another across the course of their lives， sharing its moments， bitter and sweet． "The desire for friendship comes quickly； friendship does not．" Aristotle also remarked．
If there is a secret to close friendship， that's it． Put down the device； engage the person．
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