1 . While some allergies (过敏症) disappear over time or with treatment, others last a lifetime. For decades, scientists have been searching for the source of these lifetime allergies.
Recently, researchers found that memory B cells may be involved. These cells produce a different class of antibodies known as IgG, which ward off viral infections. But no one had identified exactly which of those cells were recalling allergens or how they switched to making the IgE antibodies responsible for allergies. To uncover the mysterious cells, two research teams took a deep dive into the immune (免疫的) cells of people with allergies and some without.
Immunologist Joshua Koenig and colleagues examined more than 90, 000 memory B cells from six people with birch allergies, four people allergic to dust mites and five people with no allergies. Using a technique called RNA sequencing, the team identified specific memory B cells, which they named MBC2s that make antibodies and proteins associated with the immune response that causes allergies.
In another experiment, Koenig and colleagues used a peanut protein to go fishing for memory B cells from people with peanut allergies. The team pulled out the same type of cells found in people with birch and dust mite allergies. In people with peanut allergies, those cells increased in number and produced IgE antibodies as the people started treatment to desensitize them to peanut allergens.
Another group led by Maria Curotto de Lafaille, an immunologist at the Icahn School of Medicine at Mount Sinai in New York City, also found that similar cells were more plentiful in 58 children allergic to peanuts than in 13 kids without allergies. The team found that the cells are ready to switch from making protective IgG antibodies to allergy-causing IgE antibodies. Even before the switch, the cells were making RNA for IgE but didn’t produce the protein. Making that RNA enables the cells to switch the type of antibodies they make when they encounter allergens. The signal to switch partially depends on a protein called JAK, the group discovered. “Stopping JAK from sending the signal could help prevent the memory cells from switching to IgE production,” Lafaille says. She also predicts that allergists may be able to examine aspects of these memory cells to forecast whether a patient's allergy is likely to last or disappear with time or treatment.
“Knowing which population of cells store allergies in long-term memory may eventually help scientists identify other ways to kill the allergy cells,” says Cecilia Berin, an immunologist at Northwestern University Feinberg School of Medicine. “You could potentially get rid of not only your peanut allergy but also all of your allergies.”
1. Why did scientists investigate the immune cells of individuals with and without allergies?| A．To explore the distinctions between IgG and IgE. |
| B．To uncover new antibodies known as IgG and IgE. |
| C．To identify cells responsible for defending against allergies. |
| D．To reveal cells associated with the development of allergies. |
| A．Make. . . less destructive. | B．Make. . . less responsive. |
| C．Make. . . less protective. | D．Make. . . less effective. |
| A．MBC2s make antibodies and proteins that prevent allergies. |
| B．Memory B cells generate both RNA for IgE and the corresponding protein. |
| C．JAK plays a role in controlling antibody production when exposed to allergens. |
| D．Allergists are capable of predicting whether an allergy will last or disappear. |
| A．RNA Sequencing Is Applied in Immunology Research |
| B．Specific Cells Related to Peanut Allergies Are Identified |
| C．Unmasking Cells’ Identities Helps Diagnose and Treat Allergies |
| D．Newfound Immune Cells Are Responsible for Long-lasting Allergies |
2 . Frozen in time, a 125-million-year-old mammal attacking a dinosaur. A 39-million-year-old whale, the heaviest animal that ever lived. The oldest known jellyfish, from 505 million years ago. Paleontology (古生物学) produces newsworthy discoveries.
Fossils (化石), moreover, provide direct evidence for the long history of life, allowing paleontologists to test hypotheses (假设) about evolution with data only they provide. They allow investigation of present and past life on Earth. Flows of biological diversity, appearances of new life forms and the extinctions of long existing ones, would go undiscovered without these efforts. But the headlines over exciting new fossils greatly underestimate the true importance of paleontology. Its real significance lies in how such discoveries brighten the grand history of life on Earth. From its beginnings, more than three billion years ago, to the present day, fossils record how life adapted or disappeared in the face of major environmental challenges.
Paleontologists provide us with a unique vantage on modern climate change. They play an essential role in interpreting ancient environments, in reconstructing ancient oceans, continents and climates. Fossils provide key limitation on the climate models that are essential for predicting future climate change. And the fossil record gives important insights into how life will respond to predicted future climate conditions, because these have occurred before in Earth’s history.
In addition, paleontology has provided a fundamental contribution to human thought: the reality of species extinction and thus of a world that has dramatically changed over time. In documenting the history of life, paleontologists recognized that many extinction episodes could occur suddenly, such as the event 66 million years ago that ended the dinosaurs. The search for the causes of past mass extinctions started pioneering studies from across the scientific spectrum (科学界), focusing on potential future threats to humanity.
Not only do paleontologists know what happens to life when things go bad, they also know how long it takes for ecosystems and biodiversity to recover from these disasters, which can take far longer than modern humans have existed.
Paleontologists thus provide a unique perspective on the nature and future long-term ecological impact of the current human-produced biodiversity crisis, the so-called Sixth Extinction, and therefore the importance of protecting modern biodiversity. The very concept of a Sixth Extinction would not exist without paleontologists documenting the first five.
Paleontologists know that understanding life’s past is critical to anticipating and adapting to life’s and humanity’s future. Paleontology is important because it brings its unique and critical perspective to current challenges in climate change, biodiversity loss and the environment. Paleontologists can predict the future because they know the past.
1. The first two paragraphs are written to _______.| A．describe an event | B．raise a question |
| C．present an opinion | D．make a comparison |
| A．A positive effect. | B．A valuable suggestion. |
| C．A quick decision. | D．A comprehensive view. |
| A．Ecological recovery takes shorter than imagined. |
| B．Past lessons can help to predict the future threats. |
| C．Paleontologists can handle the biodiversity crisis. |
| D．Fossil studies focus on the causes of mass extinctions. |
| A．Paleontology: A Pioneering Study |
| B．Paleontology: A History Recorder |
| C．Paleontology Tells More About Nature Than Humans |
| D．Paleontology Is Far More Than New Fossil Discoveries |
3 . The release of ChatGPT has caused more than a little worry about its ability to produce credible pieces of writing. “The College Essay Is Dead, ” some people declared. That’s unlikely. There are obvious workarounds. For example, students wouldn’t benefit from ChatGPT if they were required to write out essays by hand.
A return to handwritten essays could benefit students in a way. For instance, neuroscience research has revealed that the act of handwriting is very different from punching letters on a keyboard. Handwriting requires precise motor skills that stimulate greater activity in a broader group of brain regions when compared with typing and engage the brain in ways that researchers have linked to learning and memory improvements. Handwriting forces those areas responsible for memory and learning to communicate with each other, which helps form networks that facilitate the recall and acquisition of new information.
Much of the research has focused on children or younger students. But there’s evidence that, even for older students and adults, completing assignments in longhand is a more cognitively (认知地) involved process, leading to better processing of ideas and more original work. Meanwhile, research on foreign-language learners has found that handwriting is associated with improvements in some measure of accuracy and comprehension. Handwriting requires you to put a filter on what you’re producing in a way that typing doesn’t. When you’re writing by hand, you need to know what you want to say before you begin. If you don’t, you’ll have to cross things out or start over. Typing on a computer requires far less forethought. It is less challenging for the brain-and challenging the brain is central to education itself.
A return to handwritten essays wouldn’t be easy on teachers, who might have to reduce the length of assignments or allocate (分配) extra class time for completion. They’d also have the burden of reading text that wasn’t neatly turned out by a word processor. But some might find all that preferable to being constantly suspicious (猜疑的) that they’re being outsmarted by a computer program.
When health issues forced the German philosopher Friedrich Nietzsche to abandon his pen in favor of a typewriter, a change occurred in his writing style, which one scholar later described as a departure from “sustained argument and prolonged reflection” to a “telegram style. ” Our writing tools work on our thoughts. Ensuring that today’s students have more than one writing tool might pay off in ways experts are only beginning to grasp. ChatGPT and other AI-powered technologies will win only if we agree to play on their home territory.
1. How can handwriting benefit students?| A．It enhances brain engagement. |
| B．It guarantees accurate comprehension. |
| C．It creates networks for communication. |
| D．It facilitates the assessment of information. |
| A．Carefully screen. | B．Passively accept. |
| C．Objectively assess. | D．Gradually discover. |
| A．The risk of weakened concentration. |
| B．The fear of being outsmarted by AI. |
| C．The trouble of marking untidy work. |
| D．The content of handwritten essays. |
| A．College education will be reformed by ChatGPT |
| B．Handwriting will replace typing due to ChatGPT |
| C．Handwritten essays can help teachers defeat ChatGPT |
| D．College teachers return to longhand to battle ChatGPT |
4 . Bed rotting — the practice of spending long periods of time just staying under the covers with snacks, screens and other creature comforts — is gaining popularity on social media. Some Generation Z trend followers are now viewing it as a form of self-care, but doctors warn too much could be “sign of depression”. Are these extended breaks really wise for one’s mental health — or could they be a cause for concern?
Dr. Ryan Sultan, a professor at Columbia University in New York, who treats many young people, called the bed rotting trend attractive. “In our culture today, with too much to do, too many expectations and too much productivity, many young individuals (个人) are feeling burned out and often aren’t getting enough sleep. It’s easy to see why taking time off to lie around is attractive,” Sultan said. “In many ways, this is beneficial. It’s a chance to get away from real-life problems and clear your head before returning to life in a better state of mind, ” he added.
For the downside, however, he said a long-term need or desire for bed rotting could do harm to one’s physical health. Spending too many daytime hours in bed — awake or not — could destroy sleep schedules. Our brains are fine-tuned for sleep in darkness and alertness in light. Lying in bed half-asleep during the day will worsen sleep schedules — once that happens, it is a challenge to fix. It could also lead to blood pressure problems and obesity (肥胖).
Long-term need or desire for bed rotting could also be a warning sign of depression, according to a mental health expert. Dr. Marc Siegel, professor of medicine at NYU Langone Medical Center and a Fox News medical contributor, agreed that while some downtime can be useful in terms of de-stressing and rejuvenation (更新), too much bed rotting is a bad health practice. In addition to increasing the risk of depression, it contributes to decreased motivation (动力) as well.
Instead of bed rotting, Siegel recommends regular exercise as a better form of de-stressing. While the occasional lazy day can be beneficial, too much could have the opposite effect. If it happens every day, that’s a fairly sensitive test for depression. Those who lack the motivation to get out of bed could also try calling or texting a family member for support, socializing with close friends, finding a small task to complete, or reaching out to a medical professional for help.
1. According to Dr. Ryan Sultan, why do young people like bed rotting?| A．They are fond of what is popular on social media. | B．They are unwilling to socialize with friends. |
| C．Bed rotting is away to escape stress. | D．Bed rotting helps fix sleep schedules. |
| A．Quickly-activated. | B．Well-trained. | C．Badly-needed. | D．Ill-equipped. |
| A．Being lazy from time to time can be good for individuals. |
| B．Sleeping in light can increase the risk of depression. |
| C．Bed rotting can allow people to avoid expectations. |
| D．Feeling down leads to decreased motivation. |
| A．Different opinions on how to become motivated. |
| B．Main causes of the long-term need for bed rotting. |
| C．Practical suggestions for young people to deal with stress. |
| D．Possible problems from lying in bed for extended periods of time. |
5 . Have you ever bought a new car and started noticing the exact color and model of car everywhere? Has that type of car just become popular in your city? Were they there before? Or are you just going crazy?
You’re not going crazy. The reason you are now just noticing them is what psychologists call “priming”. Basically, the cars were always there. You just didn’t recognize them consciously. However, when that certain model of car becomes part of your conscious thinking, you start “automatically” recognizing all of the other cars that are the same, because you are already “primed” to do so.
The priming effect takes many forms. In one study, students were asked to walk around a room for 5 minutes at a rate of 30 steps per minute, which was about one-third their normal pace. After this brief experience, the participants were much quicker to recognize words related to old age, such as forgetful, old, and lonely. Reciprocal priming effects tend to produce a coherent reaction: if you are primed to think of old age, you would tend to act old, and acting old would reinforce the thought of old age. This research shows that the way we think influences the way we act, and the way we act influences the way we think.
A similar conclusion was reached by the American psychologist William James a century ago, but he emphasized the effect on feeling. “Actions seem to follow feeling, but really actions and feeling go together; and by regulating the action, which is under the more direct control of the will, we can indirectly regulate the feeling, which is not. Thus the path to cheerfulness, should our cheerfulness be lost, is to sit up cheerfully and to act and speak as if cheerfulness were already there.”
So, that’s it. If you want to be happy, just sit up and act happy. Based on these scientific findings, we can adopt certain priming effects to help make ourselves consistently happier.
One thing we have in common is our ability to think, and thus feel. Pleasant thoughts have been proven to produce the chemicals that make us feel happy, particularly thoughts and feelings of gratitude. When we purposefully go through and think about the things we’re grateful for and deliberately feel as much gratitude as we can, we are flooding our mind with the “happy chemicals”. Furthermore, by consciously thinking, feeling and expressing gratitude, we will not only be happier in the moment, we will be “primed” to recognize the things in our life to appreciate. Each time this happens, the “happy chemicals” will be produced. Do this every day and we will become consistently happier. This makes up for the momentary happiness we gain from eating chocolate or buying new clothes. More than that, combining thoughts of gratitude with happy acts like smiling and laughing will have a supplementary positive effect on our state of mind.
1. Which of the following is an example of the priming effect?| A．Walking much faster after attending a lecture about old age. |
| B．Donating money to the poor after seeing pictures of cute cats. |
| C．Learning about various types of cars after purchasing the first car. |
| D．Completing SO_P as SOUP rather than SOAP after seeing the word EAT. |
| A．Related. | B．Two-way. | C．Well-rounded. | D．Opposite. |
| A．Eating or shopping leads to consistent feelings of happiness. |
| B．Our will has greater control over emotions than over actions. |
| C．Happy chemicals make us think about the things we’re grateful for. |
| D．Practicing gratitude frequently prepares us for long-term happiness. |
| A．Prime Yourself to Be Happier |
| B．Share Happiness to Enhance Wellbeing |
| C．Why Gratitude Is Important in Psychology |
| D．How Happy Chemicals Affect People’s Thoughts |
6 . Faced with an attempt by a new chatbot to imitate (模仿) his own songs, the musician Nick Cave delivered a strong response: it was “an absolutely horrible attempt”. He understood that AI was in its babyhood, but could only conclude that the true horror might be that “it will forever be in its babyhood”. While a robot might one day be able to create a song, he wrote, it would never grow beyond “a kind of burlesque (滑稽的模仿)”, because robots-being composed of data-are unable to suffer, while songs arise out of suffering.
Fans of Cave and his band will agree that his music is inimitable, but that doesn’t mean they would necessarily be able to tell the difference. A few days before Cave’s remarks, experts were asked to distinguish between four genuine artworks and their AI imitations. Their conclusions were wrong five times out of 12, and they were only unitedly right in one of the four picture comparisons.
These are party games, but they point to an unfolding challenge that must be managed as a matter of urgency because, like it or not, AI art is upon us. The arrival of the human-impersonating ChatGPT might have increased general awareness, but artists across a wide range of disciplines are already exploring its potential, with the dancer Wayne McGregor and London’s Young Vic Theatre among those who have created AI-based works.
A strongly-worded report from Communications and Digital Committee (CDC) issued a wake-up call to the government, urging it to raise its game in educating future generations of tech-savvy professionals, and tackling key regulatory challenges. These included reviewing reforms to intellectual property law, strengthening the rights of performers and artists, and taking action to support the creative sector in adapting to the disturbances caused by swift and stormy technological change.
While developing AI is important, it should not be pursued at all costs, the CDC stressed. It deplored the failure of the Department for Digital, Culture, and Media to offer a defence against proposed changes to intellectual property law that would give copyright exemption (版权豁免) to any work, anywhere in the world, involving AI text and data mining.
The challenges of AI are both philosophical, as Cave suggested, and practical. They will unfold over the short and long term. State-of-the-art creative industries have a key role to play in shaping and exploring the philosophical ones, but they must have the practical help they require to survive and be successful. They need it now.
1. Why does the author mention the four picture comparisons in Paragraph 2?| A．To stress the similarities between AI art and human art. |
| B．To argue that human art will be replaced by AI art. |
| C．To prove AI is stretching the boundaries of art. |
| D．To imply AI art cannot be underestimated. |
| A．Clearly analyzed. | B．Bravely suffered. |
| C．Strongly criticized. | D．Accurately perceived. |
| A．Some artists see AI as a tool even though it is a threat. |
| B．Creative industries are responsible for causing the AI problem. |
| C．Tech professionals need more training to better understand AI art. |
| D．The quality of AI art dismisses concerns about intellectual property. |
| A．The Creative Thief: AI Makes Perfect Art |
| B．AI in Art: A Battle That Must Be Fought |
| C．Threat or Opportunity: The Impact of AI on Art |
| D．The Rise of AI Art: What It Means to Human Artists |
7 . Laughing together is an important way for people to connect and bond. And though the causes of laughter can vary widely across individuals and groups, the sound of a laugh is usually recognizable between people belonging to different cultures.
But what about animals? Do they “laugh”? And are the causes of animal and human laughter alike? In humans, people may laugh when they hear a joke, or when they see something that they think is funny, though it’s unknown if animals’ intelligence includes what humans would call a sense of humor.
However, many animals produce sounds during play that are unique to that pleasant social interaction. Researchers consider such vocalizations to be similar to human laughter. Recently, scientists investigated play vocalization to see how common it was among animals. The team identified 65 species that “laughed” while playing — most were mammals (哺乳动物), but a few bird species demonstrated playful laughter too. Reports of playful laughter were notably absent in studies describing fish, perhaps because there is some question as to whether or not play exists at all in that animal group. This new study could help scientists to analyze the origins of human laughter.
But how can we identify play? Unlike fighting, play is usually repetitive and happens independently of other social behaviors, said lead study author Sasha Winkler, a doctor of biological anthropology at the University of California. When it comes to identifying it, “you know it when you see it,” Winkler told Live Science. One sign is that primates — our closest relatives — have a “play face” that is similar to the expressions of humans who are playing.
When Winkler previously worked with rhesus macaques, she had noticed that the monkeys panted (喘气) quietly while playing. Many other primates are also known to vocalize during play, she said, so a hypothesis (laughter in humans is thought to have originated during play) supported by the play-related panting laughter of many primate species was put forward.
People now still laugh during play, but we also integrate laughter into language and non-play behaviors, using laughter in diverse ways to express a range of emotions that may be positive or negative. Human laughter notably differs from other animals’ laughter in another important way: its volume. People broadcast their laughter loudly, often as a way of establishing inclusion. By comparison, when most animals laugh, the sound is very quiet — just loud enough to be heard by the laugher’s partner.
“It’s really fascinating that so many animals have a similar function of vocalization during play,” Winkler told Live Science. “But we do have these unique parts of human laughter that are also an important area for future study."
1. What is the main purpose of the passage?| A．To explain causes of animal and human laughter. |
| B．To assess complexities regarding animal laughter. |
| C．To present findings on the existence of animal laughter. |
| D．To analyze differences between animal and human laughter. |
| A．Animal laughter is even noticeable in fish. |
| B．Animal laughter is hard to recognize during play. |
| C．People have learned to combine play with laughter. |
| D．People laugh loudly because they want to involve others. |
| A．Distinctive features of human laughter. |
| B．Different functions of animal laughter. |
| C．The origin and development of human laughter. |
| D．The relationship between animal laughter and intelligence. |
8 . Technology seems to discourage slow, immersive reading. Reading on a screen, particularly a phone screen, tires your eyes and makes it harder for you to keep your place. So online writing tends to be more skimmable and list-like than print. The cognitive neuroscientist Mary Walt argued recently that this “new norm” of skim reading is producing “an invisible, game-changing transformation” in how readers process words. The neuronal circuit that sustains the brain’s capacity to read now favors the rapid absorption of information, rather than skills developed by deeper reading, like critical analysis.
We shouldn’t overplay this danger. All readers skim. Skimming is the skill we acquire as children as we learn to read more skillfully. From about the age of nine, our eyes start to bounce around the page, reading only about a quarter of the words properly, and filling in the gaps by inference. Nor is there anything new in these fears about declining attention spans. So far, the anxieties have proved to be false alarms. “Quite a few critics have been worried about attention span lately and see very short stories as signs of cultural decline,” the American author Selvin Brown wrote. “No one ever said that poems were evidence of short attention spans.”
And yet the Internet has certainly changed the way we read. For a start, it means that there is more to read, because more people than ever are writing. If you time travelled just a few decades into the past, you would wonder at how little writing was happening outside a classroom. And digital writing is meant for rapid release and response. An online article starts forming a comment string underneath as soon as it is published. This mode of writing and reading can be interactive and fun. But often it treats other people’s words as something to be quickly harvested as fodder to say something else. Everyone talks over the top of everyone else, desperate to be heard.
Perhaps we should slow down. Reading is constantly promoted as a social good and source of personal achievement. But this advocacy often emphasizes “enthusiastic”, “passionate” or “eager” reading, none of which adjectives suggest slow, quiet absorption.
To a slow reader, a piece of writing can only be fully understood by immersing oneself in the words and their slow comprehension of a line of thought. The slow reader is like a swimmer who stops counting the number of pool laps he has done and just enjoys how his body feels and moves in water.
The human need for this kind of deep reading is too tenacious for any new technology to destroy. We often assume that technological change can’t be stopped and happens in one direction, so that older media like “dead-tree” books are kicked out by newer, more virtual forms. In practice, older technologies can coexist with new ones. The Kindle has not killed off the printed book any more than the car killed off the bicycle. We still want to enjoy slowly-formed ideas and carefully-chosen words. Even in a fast-moving age, there is time for slow reading.
1. What is the author’s attitude towards Selvin Brown’s opinion?| A．Favorable. | B．Critical. | C．Doubtful. | D．Objective. |
| A．advocacy of passionate reading helps promote slow reading |
| B．digital writing leads to too much speaking and not enough reflection |
| C．the public should be aware of the impact skimming has on neuronal circuits |
| D．the number of Internet readers is declining due to the advances of technology |
| A．Comprehensive. | B．Complicated. | C．Determined. | D．Apparent. |
| A．Slow Reading Is Here to Stay |
| B．Digital Technology Prevents Slow Reading |
| C．Screen vs. Print: Which Requires Deep Reading? |
| D．Reading Is Not a Race: The Wonder of Deep Reading |
9 . Imagine a simple blood test that could flag most kinds of cancers at the earliest, most curable stage. Liquid biopsies could, in theory, detect a tumor (肿瘤) well before it could be found by touch, symptoms or imaging. Blood tests could avoid the need for surgeons to cut tissue samples and make it possible to reveal cancer hiding in places needles and scalpels cannot safely reach. They could also determine what type of cancer is taking root to help doctors decide what treatment might work best to destroy it.
Liquid biopsies are not yet in hand, because it is hard to find definitive cancer signals in a tube of blood, but progress in recent years has been impressive. Last year the journal Science published the first big prospective study of a liquid biopsy for DNA and proteins from multiple types of cancers. Though far from perfect, the blood test called CancerSEEK found 26 tumors that had not been discovered with conventional screenings.
Liquid biopsies can rely on a variety of biomarkers in addition to tumor DNA and proteins, such as free-floating cancer cells themselves. But what makes the search difficult, Ana Robles, a cancer biologist of the National Cancer Institute, explains, is that “if you have an early-stage cancer or certain types of cancer, there might not be a lot of tumor DNA,” and tests might miss it. The ideal blood test will be both very specific and very sensitive so that even tiny tumors can be found. To tackle this challenge, CancerSEEK looks for cancer-specific mutations (突变) on 16 genes, and for eight proteins that are linked to cancer and for which there are highly sensitive tests.
Simple detection is not the only goal. An ideal liquid biopsy will also determine the likely location of the cancer so that it can be treated. “Mutations are often shared among different kinds of cancer, so if you find them in blood, you don’t know if that mutation is coming from a stomach cancer or lung cancer,” says Anirban Maitra, a cancer scientist at the Anderson Cancer Center. To solve that problem, some newer liquid biopsies look for changes in gene expression. Such changes, Maitra notes, are “more organ-specific”.
On the nearer horizon are liquid biopsies to help people already diagnosed with cancer. Last year the government approved the first two such tests, which scan for tumor DNA so doctors can select mutation-targeted drugs. Scientists are working on blood tests to detect the first signs of cancer recurrence (复发) in patients who have completed treatment. This work is moving fast, but does it save lives?
That is the question companies such as Thrive and Grail must answer for their broadly ambitious screening tests. “These companies have to prove that they can detect early cancer and, more important, that the early detection can have an impact on cancer survival,” Maitra observes.
1. According to the passage, liquid biopsies are expected to| A．flag cancer and determine the treatment |
| B．detect cancer signals from a sample of blood |
| C．take images of tumors and prevent potential cancers |
| D．show types of cancer by measuring the amount of proteins |
| A．Signs of cancer recurrence are not detectable. |
| B．Different kinds of cancer have different gene mutations. |
| C．Biomarkers are much more reliable than tumor DNA and proteins. |
| D．Organ-specific cancers will be identified through changes in gene expression. |
| A．liquid biopsies can discover tumors conventional screenings can’t find |
| B．liquid biopsies can improve the application of mutation-targeted drugs |
| C．liquid biopsies can help save the lives of those with cancer |
| D．liquid biopsies can be developed for cancer prevention |
In social life, time plays a very important part. In the U.S.A., guests tend to feel that they are not highly regarded if the invitation to a dinner party is sent only three or four days
