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Read the following email from a student.Write a reply.Dear Li MingIve got a class assignment to make an oral report on an ancient Chinese scientist.I am not sure how to prepare for it Could you give me some advice?Thanks for your help.Yours.PaulWrite your letter in no less than 100 words.Don't sign your own name at the end of the letter.Use “Li Ming"instead.

The miracle of the Chesapeake Bay lies not in its depths,but in the complexity of its natural construction,the nteraction of fresh and saline waters,and the mix of land and water.The shallows provide homes for hundreds of species while storing floodwaters filtering pollutants from water,and protecting nearby communities from potentially destructive storm surges.All this was put at great risk late last month,when the US Supreme Court issued a ruling in an ldaho case that provides the US Environmental Protection Agency(EPA)far less authority to regulate wetlands and waterways.Specifically,a 5-4 majority decided that wetlands protected by the EPA under its Clean Water Act authority must have a "continuous surface connection"to bodies of water.This narowing of the regulatory scope was a victory for builders,mining operators and other commercial interests often at odds with environmental rules.And it caries "significant repercussions for water quality and flood control throughout the United States,"as Justice Brett Kavanaugh observed.In Maryland,the good news is that there are many state laws in place that provide wetlands protections.But thats a very shortsighted view,particularly when it comes to the Chesapeake Bay.The reality is that water,and the pollutants that so often come with it.don't respect state boundaries.The Chesapeake draws from a 64.000-square-milewatershed that extends into Virginia, Pennsylvania New York,West Virginia.the District of Columbia and Delaware.Will those jurisdictions extend the same protections now denied under Sackett V.EPA?Perhaps some.but all?That seems unlikely.It is too easy,and misleading,to see such court rulings as merely standing up for the rights of land owners when the consequences can be so dire for their neighbors.And it's a reminder that the EPA's involvement in the Chesapeake Bay Program has long been crucial as the means to transcend the infhuence of deep-pocketed special interests in neighboring states.Penmsylvania farmers,to use one telling example,aren't thinking about next year's blue crab harvest in Maryland when they decide whether to spread animal waste on their fields,yet the runoff into nearby creeks can have enormous impacts downstream.And so we would call on state lawmakers from Richmond to Albany to consider reviewing their own wetlands protections and see for themselves the enormous stakes involved.We can offer them a visit to Black water National Wildlife Refuge in Dorchester County where bald eagles fly over tidal marshes so shallow you could not paddle a boat across them but teaming with aquatic life.It's worth the scenic drive36.The Chesapeake Bay is described in paragraph I as 37.The U.S.Supreme Cout's ruing in the Idaho case 38.How does'the author fell about future of the chesapeake Bay? 39.What can be inferred about the EPA's involvement in the chesapeake Bay Program? 40.The author holds that the state lawmakers should

Rutkowski is a Polish digital artist who uses classical painting styles to create dreamy fantasy landscapes.He has made illustrations for games such as Sony's Horizon Forbidden West,Ubisoft's Anno,Dungeons&Dragons,and Magic:The Gathering.And he's become a sudden hit in the new world of text-to-image Al generationHis distinctive style is now one of the most commonly used prompts in the new open-source AI art generator Stable Diffusion,which was launched late last month.The tool,along with other popular image-generation AI models,allows anyone to create impressive images based on text prompts.For example,type in"Wizard with sword and a glowing orb of magic fire fights a fierce dragon Greg Rutkowski,”and the system will produce something that looks not a million miles away from works in Rutkowski's style.But these open-source programs are built by scraping images from the Internet,often without permission and proper attribution to artists.As a result,they are raising tricky questions about ethics and copyright.And artists like Rutkowski have had enough.According to the website Lexica,which tracks over 10 million images and prompts generated by Stable Diffusion,Rutkowski's name has been used as a prompt around 93,000 times.Some of the world's most famous artists,such as Michelangelo,Pablo Picasso,and Leonardo da Vinci,brought up around 2,000 prompts each or less.Rutkowski's name also features as a prompt thousands of times in the Discord of another text-to-image generator,Midjourney.Rutkowski was initially surprised but thought it might be a good way to reach new audiences.Then he tried searching for his name to see if a piece he had worked on had been published.The online search brought back work that had his name attached to it but wasn't his."It's been just a month.What about in a year?I probably won't be able to find my work out there because[theinternet]will be flooded withAl art,"Rutkowski says."That's concerning."“There is a coalition growing within artist industries to figure out how to tackle or mitigate this,”says Ortiz.The group is in its early days of mobilization,which could involve pushing for new policies or regulation.One suggestion is that AI models could be trained on images in the public domain,and AI companies could forge partnerships with museums and artists,Ortiz says.31.What can be learned about Rutkowski from the first two paragraphs?32.The problem with open-source AI art generators is that they 33.After searching online,Rutkowski found 34.According to Ortiz.AI companies are advised to 35.What is the text mainly about?

设A 是秩为2的3阶矩阵，α是满足Aα=0的非零向量，若对满足βTα=0的任意向量β,均有Aβ=β, 则（）。

Parenting tips obtained from hunter-gatherers in Africa may be the key to bringing up more contented children,researchers have suggested.The idea is based on studies of communities such as the Kung of Botswana,where each child is cared for by many adults.Kung children as young as four will help to look after younger ones and"baby-wearing,"in which infants are carried in slings,is considered the norm.According to Dr.Nikhil Chaudhary,an evolutionary anthropologist at Cambridge University,these practices,known asalloparenting,could lead to less anxiety for children and parents.Dr.Annie Swanepoel,a child psychiatrist,believes that there are ways to incorporate them into Western life.In Gennany,one scheme has paired an old people's home with a nursery.The residents help to look after the children,an arrangement akin to alloparenting.Another measure could be encouraging friendships between children in different school years to mirror the supervised mixed-age playgroups in hunter-gatherer communities.In a paper published in the Joumal of Child Psychology and Psychiatry,researchers said that the Western nuclear family was a recent invention that broke with evolutionary history.This abrupt shift to an"intensive mothering narrative,"which suggests that mothers should manage childcare alone,was likely to have been harmful."Such narratives can lead to maternal exhaustion and have dangerous consequences,"they wrote.By contrast,in hunter-gatherer socicties,adults other than the parents can provide almost half of a childs care.One previous study looked at the people of the Democratic Republic of Congo.It found that infants had an average of 14 all parents a day by the time they were 18 weeks old and were passed between caregivers eight times an hour.Chaudhary said that parents now had less childcare support from family and social networks than during most of human evolutionary history,but introducing additional caregivers could reduce stress and matemal depression,which could have a"knock-on"benefit to a childs wellbeing.An infant born to a hunter-gatherer society could have more than ten caregivers-this contrasts starkly with nursery settings in the UK where regulation allows for a ratio of one carer to four children aged two to threeWhile hunter-gatherer children learn and learn from observation and imitation in mixed-age playgroups,researchers said that Western"instructive teaching,"where pupils are asked to sit still,may contribute to conditions such as attention deficit hyperactivity disorder.Chaudhary said that Britain should explore the possibility that older siblings helping their parents"might also enhance their own social development."26.According to the first two paragraph,alloparenting refers to the practice of 27.The scheme in Gemany is mentioned to illustrate 28.According to Paragraph 4,the"intensive mothering narrative", 29.According to paragraph 6,what can we learn about nursery in the UK?30.Which of the following would be the best title?

Nearly 2000 years ago,as the Romans began to pull out of Scotland,they left behind a curious treasure:10 tons of nails,nearly a million of the things.The nail hoard was discovered in 1960 in a four-metre-deep pit covered by two metres of gravel.Why had the Romans buried a million nails?The likely explanation is that the withdrawl was rushed,and they didnt want the local Caledoions getting their hands on 10 tons of weapons grade iron.The Romans buried the nails so deep that they would not be discovered for almost two millenia.Later civilisations would value the skilled blacksmith's labour in a nail even more than the raw material.As Roma A ground explains in her new delightful book nuts and Bolts,early 17th-century Virginians would sometimes bum down their homes if they were planning to relocate.This was an attempt to recover the valuable nails,which could be reused after sifing the ashes.The price of nails fell by 90%between the late 1700s and mid 1900s,as economist Daniel Sichel points out in a research paper.According to Sichel,although the falling price of nails was driven partly by cheaper iron and cheaper energy,most of the credit goes to nail manufacturers who simply found more efficient ways to turn steel into nails.Nails themselves have changed over the years,but Sichel studied them because they haven't changed much21.Romans buried the nails probably for the sake of .22.The example of early 17th-century virginians is used to .23.What played the major role in lowering the price of nail after the late 1700?24.It can be learned from Paragraph 5 that nails .25.Which of the following one best summaries the last2 paragraphs?

TherThere's nothing more welcoming than a door opening for you. 1 the need to be touched to open or close,automatic doors are essential in 2 disabled access to buildings and helping provide general 3 to commercial buildings.Self-sliding doors began to emerge as a commercial product in 1960 after being invented six years 4 by Americans Dee Horton and Lew Hewitl.They 5 as a novelty feature,but as their use has grown,their 6 have extended within our technologically advanced world.Particulary 7 in busy locations or during times of emergency,the doors 8 crowd management by reducing the obstacles put in people's way.9 making access both in and out of buildings easier for people,the difference in the way many of these doors open helps reduce the total area 10 by them.Automatic doors often open to the side,with the panels sliding across one another.Replacing swing doors,these 11 smaller buildings to maximise the usable space inside without having to 12 the way for a large,sticking-out door.There are many different types of automatic door,with each 13 specific signals to tell them when to open 14 these methods differ the main 15 remain the sameEach automatic door system 16 the light,sound weight or movement in their vicinity as a signal to open.Sensor types are chosen to 17 the different environments they are needed in. 18 ,a busy street migle not 19 a motion-sensored door,as it would constantly be opening for passers-by.A pressure sensitive mat would be more 20 to limit the surveyed area

High school students eager to stand out in the college application process often participate in a litany of extracurricular activities hoping to bolster their chances of admission a selective undergraduate institution.However, college admissions experts say that the quality of a college hopeful's extracurricular activities matter more than the number of activities he or she participates in.Sue Rexford, the director of college guidance at the Charles. E. Smith Jewish Day School , says it is not necessary for a student,filling out the Common Application to list lo activities in the application“No” college will expect that a students has a huge laundry list of extracurriculars that they have been passionately involved in each for an tended period of time, " Rexfon d wrote in an email.Experts say it is toughen to distinguish oneself in a school-affiliated extracurricular activity that is common among high school students than it is to stand out while doing an uncommon activity.The competition to stand out and make an impact is going to be much stiffer, and so if they 're going to do a popular activity, I'd say, be the best at it."says Sara Harherson, a college admission consultant.High school students who have an impressive personal project they are working on independently often impress colleges, experts say."For example, a student with an interest in entrepreneurship could demonstrate skills and potential by starting a profitable small business." Olivia Valdes, the founder or Zen Admissions consulting firm, wrote in an email.Josoph Adegboyega—Edun, a Maryland High school guidance counselor, says unconventional, extracurricular activities can help students, impress college admissions offices, assuming they demonstrated, serious commitment."Again, since one of the big question. high school seniors muse consider is"What makes you unique?" having an uncommon, extracurricular activity, a conventional one is an advantage," he wrote in an email.Experts say demonstrating talent in at least one extracurricular activity can help in the college admissions process, especially at top-tier undergraduate institutions.“Distinguishing yourself in one focused type of extracurricular activity can be a positive in the admissions process, especially for highly selective institutions, where having top grades and test scores is not enough,”Katie Kelley admissions counselor at Ivy Wise admissions consultancy, wrote in an email.“Students need to have that quality or hook that will appeal to admissions officers and allow them to visualize how the student might come and enrich their campus community.”Extracurricular activities related to the college major declared on a college application are beneficial, experts suggest.“If you already know your major, having an extracurricular that fits into that major can be a big plus,”says Mayghin Levine, the manager of educational opportunities with The Cabbage Patch Settlement House, a Louisville, Kentucky, nonprofit community center.High school students who have had a strong positive influence on their community through an extracurricular activity may impress a college and win a scholarship, says Erica Gwyn, a former math and science magnet program assistant at a public high school who is now executive director of the Kaleidoscope Careers Academy in Atlanta, a nonprofit organization.

If you look at the apps on your phone, chances are you have at least one related to your health—and probably several. Whether it is a mental health app, a fitness tracker, a connected health device or something else, many of us are taking advantage of this technology to keep better track of our health in some shape or form. Recent research from the Organization for the Review of Care and Health Applications found that 350,000 health apps were available on the market, 90,000 of which launched in 2020 alone.While these apps have a great deal to offer, it is not always clear how the personal information we input is collected, safeguarded and shared online. Existing health privacy law, such as the Health Insurance Portability and Accountability Act, is primarily focused on the way hospitals, doctors’ offices, clinics and insurance companies store health records online. The health information these apps and health data tracking wearables are collecting typically does not receive the same legal protections.Without additional protections in place, companies may share (and potentially monetize) personal health information in a way consumers may not have authorized or anticipated. In 2021, Flo Health faced a Federal Trade Commission（FTC） investigation. The FTC alleged in a complaint that "despite express privacy claims, the company took control of users' sensitivity fertility data and shared it with third parties.” Flo Health and the FTC settled the matter with a Consent Order requiring the company to get app users' express affirmative consent before sharing their health information as well as to instruct the third parties to delete the data they had obtained.Section 5 of the FTC Act empowers the FTC to initiate enforcement action against unfair or deceptive acts, meaning the FTC can only act after the fact if a company's privacy practices are misleading or cause unjustified consumer harm. While the FTC is doing what it can to ensure apps are keeping their promises to consumers around the handling of their sensitive health information, the rate at which these health apps are hitting the market demonstrates just how immense of a challenge this is.As to the prospects for federal legislation, commentators suggest that comprehensive federal privacy legislation seems unlikely in the short term. States have begun implementing their own solutions to shore up protections for consumer-generated health data. California has been at the forefront of state privacy efforts with the California Consumer Privacy Act of 2018. Virginia，Colorado and Utah have also recently passed state consumer data privacy legislation.1.2.3.Before sharing its users' health information, Flo Health is required to____.4. What challenges is the FTC currently faced with?5.

One of the biggest challenges in keeping unsafe aging drivers off the road is convincing them that it’s time to turn over the keys.“It’s a complete life-changer” when someone stops — or is forced to stop — driving, said Anne M. Menke, a former risk manager for the Ophthalmic Mutual Insurance Co.Part of the problem in keeping older drivers safe is that the difficulties are addressed piecemeal by different professions with different focuses, including gerontologists, highway administration officials, automotive engineers and others, said Elizabeth Dugan, an associate professor of gerontology at the University of Massachusetts. “There’s not a National Institute of Older Driver Studies,” she said. “We need better evidence on what makes drivers unsafe” and what can help, said Dugan, who has written extensively about healthy aging for Consumer Reports and other organizations.One thing that does seem to work is requiring drivers to report in person for license renewal. Mandatory in-person renewal was associated with a 31 percent reduction in fatal crashes involving drivers 85 or older, according to one study. Passing vision tests also produced a similar decline in fatal crashes for those drivers, although there appeared to be no benefit from combining the two.Many older drivers don’t see eye doctors or can’t afford to. Primary care providers have their hands full and may not be able to follow through with patients who have trouble driving because they can’t turn their heads or remember where they are going — or have gotten shorter and haven’t changed their seat settings sufficiently to reach car pedals easily.As long as there are other cars on the roads, self-driving cars won’t solve the problems of crashes, said Dugan. Avoiding dangers posed by all those human drivers would require too many algorithms, she said. But we need to do more to improve safety, said Dugan.“If we’re going to have 100-year lives, we need cars that a 90-year-old can drive comfortably.”1.According to Paragraph1, keeping unsafe aging drivers off the road .2.The American medical associations advice .3.According to Dugan, efforts to keep older drivers safe _.4.Some older drivers have trouble driving because they tend to _.5.Dugan thinks that the solution to the problems of crashes may lie in_____.

THE UK is facing a future construction crisis because of a failure to plant trees to produce wood, a trade body has warned. Confor chiefs believe urgent action is needed to reduce the country's reliance on timber imports and provide a stable supply of wood for future generations. Currently only 20 per cent of the UK's wood requirement is homegrown while it remains the second-largest net importer of timber in the world, bringing in around £7.5 billion annually. Coming at a time of fresh incentives from the UK government for landowners to grow more trees, the trade body says these don't go far enough and fail to promote the benefits of planting them to boost timber supplies. “Not only are we facing a carbon crisis now, but we will also be facing a future construction crisis because of a failure to plant trees to produce wood," said Stuart Goodall, chief executive of Confor. "For decades we have not taken responsibility for investing in our domestic wood supply, leaving us exposed to fluctuating prices and fighting for future supplies of wood as global demand rises and our own supplies fall." The UK has ideal conditions for growing wood to build low-carbon homes and is a global leader in certifying that its forests are sustainably managed, Confor say. While around three quarters of Scottish homes are built from Scottish timber, the use of home-grown wood in England is only around 25 per cent. The causes of the UK’s current position are complex and range from outdated perceptions of productive forestry to the decimation of trees from grey squirrels. It also encompasses significant hesitation on behalf of farmers and other landowners to invest in longer term planting projects. While productive tree planting can deliver real financial benefits to rural economies and contribute to the UK’s net zero strategy, the focus of government support continues to be on food production and the rewilding and planting of native woodland solely for biodiversity. The recently launched Woodland Creation Offer, which pledges farmers and landowners £10,000 for each hectare planted, failed to mention timber production, albeit the Forestry Commission's Richard Stanford has since spoken of the importance of it. Stuart added: "While food production and biodiversity health are clearly of critical importance, we need our land to also provide secure supplies of wood for construction, manufacturing and to contribute to net zero. “While the UK government has stated its ambition for more tree planting, there has been little action on the ground. Confor is now calling for much greater impetus behind those aspirations to ensure we have enough wood to meet increasing demand.”1. It can be learned from Paragraph 1 that UK need to .2. According to Confor, UK government fresh incentives .3. The UK exposure to fluctuating wood prices is the result of .4. Which of following causes the shortage of wood supply?5. What does Goodall think US government should do?

Your social life is defined as "the activities you do with other people, for pleasure, when you are not working". It's important to have a social life, but what's right for one person won’t be right for another. Some of us feel energised by spending lots of time with others, （ 1 ） some of us may feel drained, even if it’s doing something we enjoy.This is why finding a （ 2 ） in your social life is key. Spending too much time on your own, not （ 3 ） others, can make you feel lonely and （ 4 ）. Loneliness is known to impact on your mental health and （ 5 ） a low mood. Anyone can feel lonely at any time. This might be especially true if, （ 6 ） you are working from home and you are （ 7 ）on the social conversations that happen in the office. Other life changes also （ 8 ） periods of loneliness too, such as retirement, changing a job or becoming a parent.It’s important to recognize feelings or loneliness. There are ways to （ 9 ） a social life. But it be overwhelming （ 10 ）. You can then find groups and activities related to those where you will be able to meet （ 11 ） people. There are groups aimed at new parents, at those who want to （ 12 ） a new sport for the first time or networking events for those in the same profession to meet up and （ 13 ） ideas.On the other hand, it is （ 14 ）possible to have too much of a social life. If you feel like you’re always doing something and there is never any （ 15 ） in your calendar for downtime, you could suffer social burnout or social （ 16 ）. We all have our own social limit and it's important to recognize when you're feeling like it's all too much. Low mood, low energy, irritability and trouble sleeping could all be （ 17 ） of poor social health. Make sure you （ 18 ） some time in your diary when you're （ 19 ） for socialising and use this time to relax, （ 20 ） and recover.

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