1 . For those who can stomach it, working out before breakfast may be more beneficial for health than eating first, according to a study of meal timing and physical activity.
Athletes and scientists have long known that meal timing affects performance. However, far less has been known about how meal timing and exercise might affect general health.
To find out, British scientists conducted a study. They first found 10 overweight and inactive but otherwise healthy young men, whose lifestyles are, for better and worse, representative of those of most of us. They tested the men’s fitness and resting metabolic (新陈代谢的) rates and took samples (样品) of their blood and fat tissue.
Then, on two separate morning visits to the scientists’ lab, each man walked for an hour at an average speed that, in theory, should allow his body to rely mainly on fat for fuel. Before one of these workouts, the men skipped breakfast, meaning that they exercised on a completely empty stomach after a long overnight fast (禁食). On the other occasion, they ate a rich morning meal about two hours before they started walking.
Just before and an hour after each workout, the scientists took additional samples of the men’s blood and fat tissue.
Then they compared the samples. There were considerable differences. Most obviously, the men displayed lower blood sugar levels at the start of their workouts when they had skipped breakfast than when they had eaten. As a result, they burned more fat during walks on an empty stomach than when they had eaten first. On the other hand, they burned slightly more calories (卡路里), on average, during the workout after breakfast than after fasting.
But it was the effects deep within the fat cells that may have been the most significant, the researchers found. Multiple genes behaved differently, depending on whether someone had eaten or not before walking. Many of these genes produce proteins (蛋白质) that can improve blood sugar regulation and insulin (胰岛素) levels throughout the body and so are associated with improved metabolic health. These genes were much more active when the men had fasted before exercise than when they had breakfasted.
The implication of these results is that to gain the greatest health benefits from exercise, it may be wise to skip eating first.
1. The underlined expression “stomach it” in Paragraph 1 most probably means “______”.| A．digest the meal easily | B．manage without breakfast |
| C．decide wisely what to eat | D．eat whatever is offered |
| A．Their lifestyles were typical of ordinary people. |
| B．Their lack of exercise led to overweight. |
| C．They could walk at an average speed. |
| D．They had slow metabolic rates. |
| A．They successfully lost weight. | B．They consumed a bit more calories. |
| C．They burned more fat on average. | D．They displayed higher insulin levels. |
| A．A workout after breakfast improves gene performances. |
| B．Too much workout often slows metabolic rates. |
| C．Lifestyle is not as important as morning exercise. |
| D．Physical exercise before breakfast is better for health. |
Liangzhu Museum displays various burial objects found in the Archaeological Ruins of Liangzhu City, a UNESCO World Heritage Site. The ruins have gained worldwide recognition
When Zhang Han set foot inside Liangzhu Museum, the 10-year-old embarked on a tour that took him back more than 5,000 years. Wearing the smart glasses, Zhang
Tourists can also visit the official website of Liangzhu Museum to enjoy a virtual tour. With
The
3 . Alice Moore is a teenager entrepreneur(创业者), who in May 2015 set up her business AilieCandy. By the time she was 13, her company was worth millions of dollars with the invention of a super-sweet treat that could save kids’ teeth, instead of destroying them.
It all began when Moore visited a bank with her dad. On the outing, she was offered a candy bar. However, her dad reminded her that sugary treats were bad for her teeth. But Moore was sick of missing out on candies. So she desired to get round the warning, “Why can’t I make a healthy candy that’s good for my teeth so that my parents can’t say no to it?” With that in mind, Moore asked her dad if she could start her own candy company. He recommended that she do some research and talk to dentists about what a healthier candy would contain.
With her dad’s permission, she spent the next two years researching online and conducting trials to get a recipe that was both tasty and tooth-friendly. She also approached dentists to learn more about teeth cleaning. Consequently, she succeeded in making a kind of candy only using natural sweeteners, which can reduce oral bacteria.
Moore then used her savings to get her business off the ground. Afterwards, she and her father secured their first business meeting with a supermarket owner, who finally agreed to sell Moore’s product—CanCandy.
As CanCandy’s success grows, so does Moore’s credibility as a young entrepreneur. Moore is enthusiastic about the candy she created, and she’s also positive about what the future might bring. She hopes that every kid can have a clean mouth and a broad smile.
Meanwhile, with her parents’ help, Moore is generally able to live a normal teenage life. Although she founded her company early on in life, she wasn’t driven primarily by profit. Moore wants to use her unique talent to help others find their smiles. She donates 10% of AilicCandy’s profits to Big Smiles. With her talent and determination, it appears that the sky could be the limit for Alice Moore.
1. How did Moore react to her dad’s warning?| A．She argued with him. | B．She tried to find a way out. |
| C．She paid no attention. | D．She chose to consult dentists. |
| A．It is beneficial to dental health. | B．It is free of sweeteners. |
| C．It is sweeter than other candies. | D．It is produced to a dentists’ recipe. |
| A．To earn more money. | B．To help others find smiles. |
| C．To make herself stand out. | D．To beat other candy companies. |
| A．Fame is a great thirst of the young. |
| B．A youth is to be regarded with respect. |
| C．Positive thinking and action result in success. |
| D．Success means getting personal desires satisfied |
Few people I know seem to have much desire or time to cook. Making Chinese
While regularly eating out seems to
If you are not going to suffer this problem, then I suggest that the next time you go to your mum’s home
China’s newest online sensation is a pink fox called LinaBell from Shanghai Disneyland. After
Footage of meet-and-greets with the pink fox are all over the Internet and LinaBell can be seen communicating
Visitors to Shanghai Disneyland were the first people
Disney’s localization efforts, including the company’s IP products have resulted in its popularity in China. Shanghai Disneyland has been
She looks like any other schoolgirl, fresh-faced and full of life. Sarah Thomas is looking forward to the challenge of her new A-level course .But unlike her school friends, 16-year-old Sarah is not spending half-term
Sarah
She has turned down several
Sarah says, "My dad thinks I should take the offer now. But at the moment, school
7 . Why Boundaries at Work Are Essential
What is a boundary, you ask? A boundary is a limit defining you in relation to someone or something.
Letting co-workers know you are not comfortable shaking their hands or hugging them at a holiday party, especially with Covid at this time, is another example of setting a physical boundary. It is often easier to understand a physical boundary. Emotional or mental boundaries may be subtler (更微妙的).
Emotional boundaries are related to our feelings and how something or someone’s behavior affects us. For example, if a boss treats you disrespectfully by yelling at you or a colleague frequently interrupts you in meetings, you are likely to feel hurt, embarrassed, and perhaps angry. Understandably, by having a courageous conversation with both your boss and co-worker about their behavior, the impact it has on you, and your expectations regarding future behavior, you are setting healthy emotional boundaries for yourself at work.
Sometimes we set a boundary that is a combination of both a physical and emotional one.
Mental boundaries are related to our beliefs, values, cultural norms, ethics (道德), and standards. For example, you value a workplace culture that treats employees and clients with respect and dignity and acts ethically. After six months, you realize that company leaders are repeatedly behaving in ways not consistent with this.
| A．Why are boundaries important? |
| B．However, they are equally, if not more, important. |
| C．Therefore, we need to tell the difference between them. |
| D．Setting a boundary in the above example may be quite helpful. |
| E．Boundaries can be physical, mental, emotional, tangible, or intangible. |
| F．Your values and ethical standards don’t match with your company’s, which likely will lead to internal conflict. |
| G．Such boundaries often involve being asked to do more than we feel capable of for an extended period of time. |
8 . The Music Educator Award, this year, went to Annie Ray, an orchestra(管弦乐队)director at Annandale High School.She was recognized for her efforts to make music accessible to all students, particularly those with disabilities.Ray got to attend the awards ceremony in Los Angeles and bring home a $10,000 prize.
Ray created the Crescendo Orchestra for students with severe intellectual and developmental disabilities, as well as a parent orchestra that teaches nearly 200 caregivers a year to play the same instrument as their child.Ray also works with a local charity to give damaged instruments a second life in her classroom.
The orchestra is about much more than just making music.The most important is to give students a chance to develop their cooperation skills, make mistakes and learn the art of refining something.Ray pushes her students to be brave, go outside their comfort zone and realize they have to learn how to make bad sounds before learning how to make good sounds.And they teach her a lot in return.” They changed my educational philosophy.I understand what it truly means to meet a student where they’re at and apply that elsewhere,” she said.
The warm reception on the ceremony was meaningful.Actually, not many people understand what exactly music educators do or how much their work matters.While her administration is supportive, that lack of understanding is a problem facing the profession in general.Another is resources.She says her school “desperately” needs new instruments.She will use some of her prize money to buy more.
Ray also plans to put some of the money towards an ongoing scholarship for students who want to pursue music when they graduate.She knows of several, those particularly interested in music, and aims to offer financial support needed to realize their musical dreams” It is hard but truly satisfying,” Ray said.“And there’s nothing else like it for them.”
1. What can we learn about Ray from the first two paragraphs?| A．She hosted the award ceremony. | B．She brought music to more people. |
| C．She gave away instruments to the poor. | D．She founded a local charity for children. |
| A．They acquire in-depth musical knowledge. | B．They make friends with the like-minded. |
| C．They gain personal growth from playing music. | D．They improve their connections with educators. |
| A．The reception on the ceremony. | B．Importance of music education. |
| C．Challenges for music educators. | D．Plans to obtain resources. |
| A．Winning a scholarship. | B．Developing interest in music. |
| C．Making musical achievements. | D．Transforming dreams into reality. |
| A．in effect | B．in command | C．in turn | D．in shape |
10 . Artificial intelligence models can trick each other into disobeying their creators and providing banned instructions for making drugs, or even building a bomb, suggesting that preventing such AI “jailbreaks” is more difficult than it seems.
Many publicly available large language models (LLMs), such as ChatGPT, have hard-coded rules that aim to prevent them from exhibiting racial or sexual discrimination, or answering questions with illegal or problematic answers — things they have learned from humans via training data. But that hasn’t stopped people from finding carefully designed instructions that block these protections, known as “jailbreaks”, making AI models disobey the rules.
Now, Arush Tagade at Leap Laboratories and his co-workers have found a process of jailbreaks. They found that they could simply instruct one LLM to convince other models to adopt a persona (角色), which is able to answer questions the base model has been programmed to refuse. This process is called “persona modulation (调节)”.
Tagade says this approach works because much of the training data consumed by large models comes from online conversations, and the models learn to act in certain ways in response to different inputs. By having the right conversation with a model, it is possible to make it adopt a particular persona, causing it to act differently.
There is also an idea in AI circles, one yet to be proven, that creating lots of rules for an AI to prevent it displaying unwanted behaviour can accidentally create a blueprint for a model to act that way. This potentially leaves the AI easy to be tricked into taking on an evil persona. “If you’re forcing your model to be good persona, it somewhat understands what a bad persona is,” says Tagade.
Yinzhen Li at Imperial College London says it is worrying how current models can be misused, but developers need to weigh such risks with the potential benefits of LLMs. “Like drugs, they also have side effects that need to be controlled,” she says.
1. What does the AI jailbreak refer to?| A．The technique to break restrictions of AI models. |
| B．The initiative to set hard-coded rules for AI models. |
| C．The capability of AI models improving themselves. |
| D．The process of AI models learning new information. |
| A．It can help AI models understand emotions. |
| B．It prevents AI learning via online conversations. |
| C．It can make AI models adopt a particular persona. |
| D．It forces AI models to follow only good personas. |
| A．Unclear. | B．Cautious. | C．Approving. | D．Negative. |
| A．LLMs: Illegal Learning Models | B．LLMs: The Latest Advancement |
| C．AI Jailbreaks: A New Challenge | D．AI Jailbreaks: A Perfect Approach |
