相关试卷

Do you often find yourself agreeing to things you don't really want to do? Perhaps you say "yes" to extra work when you're already busy, or attend social events when you'd rather rest at home. For many young people, the fear of disappointing others makes it incredibly hard to refuse requests. However, learning to set boundaries is essential for mental health and personal growth.

Understand Your Priorities First

Before you can effectively say "no" to others, you need to be clear about what matters to you. Take time to identify your core values, goals, and limits. Ask yourself: What do I truly want to achieve? How much energy do I have? When you understand your own priorities, a strange thing happens — you start to realize that every "yes" to something unimportant is actually a "no" to something that truly counts. The clarity makes it easier to turn down requests that don't align with your path.

Many people believe that saying "no" is rude or selfish. The truth is quite different. When you refuse a request politely and honestly, you show respect for both yourself and the other person. A simple "I'd love to help, but I have other commitments right now" is perfectly acceptable. In fact, most people will respect your honesty more than they would appreciate a reluctant "yes" followed by poor performance or hidden resentment.

Start with Small Refusals

If setting boundaries feels terrifying, don't worry — you're not alone. Like any skill, saying "no" requires practice. Begin with low-stakes situations where the consequences of refusal are minor. Decline an invitation to a movie you don't want to see. Politely tell a classmate you can't help with their project this time. Each small success builds your confidence. Eventually, what once felt impossible becomes natural.

A. Make a promise even when you are unwilling.

B. Recognize That "No" Can Be a Form of Respect.

C. Actually, a sincere refusal is better than a false "yes".

D. This self-awareness serves as your inner decision-making guide.

E. Over time, you can handle more challenging situations with ease.

F. Here are some practical strategies to help you master this vital skill.

G. This understanding often comes from painful experiences of overcommitment.

The sensor, as thin as a piece of paper, can be comfortably attached to human skin without any pressure or discomfort. It is embedded with special enzyme materials that generate electricity by reacting with substances in human sweat, such as lactic acid and glucose. The electricity produced is enough to support the device's normal work of monitoring body signals, including heart rate, body temperature and muscle tension. What's more, the sensor can store extra energy for use when sweat is not available, ensuring continuous and stable operation.

One of the most important advantages of this sweat-powered device is its environmental friendliness. Traditional wearable electronics rely heavily on lithium batteries, which contain heavy metals and cause serious environmental pollution after being abandoned. In contrast, the new sensor uses harmless biological materials and produces no waste during use. It also avoids the trouble of frequent charging, bringing great convenience to users in long-term health monitoring.

At present, the sensor has successfully passed laboratory tests and preliminary clinical trials. Researchers have proved that it can work continuously for more than 12 hours on a small amount of sweat and maintain high accuracy in data collection. Although the current version is still designed for medical monitoring, the team believes the technology can be applied to more fields in the future, such as sports training, virtual reality control and daily health management.

Industry experts believe this sweat-powered technology will reshape the future of wearable electronics. It solves two main problems of traditional wearables: battery limitation and environmental pollution. With further optimization and mass production, this skin-friendly, self-powered sensor is expected to become a mainstream product in the next generation of wearable devices, providing safer and more convenient health monitoring solutions for human beings.

In the race to decarbonize (脱碳) the aviation industry, researchers are increasingly turning their attention to Sustainable Aviation Fuels (SAFs). Unlike conventional jet fuel, which is derived from crude oil (原油), SAFs are produced from renewable feedstocks such as used cooking oil, animal fat, and even carbon dioxide. The International Air Transport Association (IATA) has estimated that SAFs could contribute up to 65% of the aviation sector's emissions reduction goals by 2050, making them a cornerstone (基石；核心) of the industry's green transition.

However, the widespread adoption of SAFs faces significant challenges. Currently, these fuels cost roughly two to three times more than traditional jet fuel due to high production costs and limited scalability. Another hurdle is the lack of global infrastructure for production and distribution. While major airlines have committed to using increasing amounts of SAFs, the global supply currently meets only about 0.1% of aviation's total demand.

To address this, scientists are exploring innovative production techniques. A team at a leading university has developed a new catalytic process that can convert carbon dioxide directly into jet fuel using green hydrogen, generated by renewable electricity. This method, known as "power-to-fuel," offers the promise of a circular economy, where emissions are captured and reused rather than released into the atmosphere.

Moreover, recent flight tests have shown that SAFs can be seamlessly blended with conventional fuel in existing aircraft engines without modification. This compatibility (兼容性) is a crucial technical breakthrough, as it means airlines do not need to invest in new fleets to adopt the greener alternative. Dr. Elena Marquez, a leading aerospace engineer, remains optimistic. "SAFs are not just a theoretical solution; they are a viable (可行的) path forward. With targeted government policies and private investment, we can scale up production quickly," she said.

Ultimately, while the journey to fully sustainable aviation is long, SAFs represent the most promising short-term strategy to reduce the carbon footprint of the skies.

Lin started his "second-hand toy hospital" in a small corner of the community center. He used his pocket money to buy simple tools and searched online for repair tutorials (教程). At the beginning, few people trusted him. Parents wondered if a teenager had the professionalism to fix their children's beloved toys. However, Lin refused to be discouraged. He spent every weekend polishing his skills, testing each toy meticulously before returning it.

His patience finally paid off. A week later, a worried mother brought her son's malfunctioning robot. Despite its broken circuit board, Lin managed to repair it with spare parts. The moment the robot started moving again, the child's laughter warmed Lin's heart. Word spread quickly, and soon, Lin's repair desk was crowded with colorful toys.

"Toys are not just trash; they carry memories," Lin explained. "Giving them a new life means giving happiness back to children." This winter, Lin plans to expand his project to include a "toy donation station," hoping to pass more joy to kids in need. His small act has turned digital history into tangible warmth.

With the rise of independent learning and group study, our school has launched three new shared study spaces on the third floor of the library this semester. Designed to meet different study needs, these spaces are open to all students free of charge, but advance booking is required.

Space 1: Quiet Individual Study Room

This space is for students who need a silent environment for personal learning, such as reading, doing homework or preparing for exams. It has 30 single desks with adjustable chairs and USB charging ports. No talking or group discussions are allowed here.Opening hours: 7:00 a.m. – 10:00 p.m. on weekdays; 8:00 a.m. – 9:00 p.m. on weekends.Booking rules: Book 1 day in advance via the school's official WeChat mini-program; each student can book up to 4 hours per day.

Space 2: Group Discussion Room

It is suitable for 4–8 students to carry out group projects, seminar preparations and language practice. Each room is equipped with a whiteboard, a projector and comfortable sofas.Opening hours: 8:00 a.m. – 9:30 p.m. on weekdays; 9:00 a.m. – 8:30 p.m. on weekends.Booking rules: Book 2 days in advance; the booking time ranges from 1 hour to 3 hours each time, and no repeated booking on the same day.

Space 3: Creative Learning Lab

This unique space is for students to do creative tasks like handcraft making, poster designing and model building. It provides basic tools and materials, and students can also bring their own supplies. Opening hours: 9:00 a.m. – 8:00 p.m. on weekdays; closed on weekends.Booking rules: Book 3 days in advance; only for class groups or student clubs, no individual booking.

To book, log in to the mini-program with your student ID number, choose the target space and time, and wait for the system confirmation. Please arrive on time and keep the space clean. For more questions, contact the library office at 021-66668888.

1. 公园的环境；

2. 你对公园的感受。

注意：

1. 写作词数应为 80 个左右；

2. 开头和结尾已给出，不计入总词数；

3. 请按如下格式在答题纸的相应位置作答。

Dear Chris,

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Yours,

Li Hua