Một lò xo có chiều dài tự nhiên \({l_0} = 15cm\). Lò xo được giữ cố định một đầu còn đầu kia chịu mọt lực kéo F=4,5N. Khi ấy lò xo dài l=18cm. Độ cứng của lò xo

Dựa trên cơ sở nào sau đây để phân chia các quốc gia trên thế giới thành nhóm nước phát triển và đang phát triển?

Nhận định nào sau đây đúng khi bàn về vấn đề thị trường?

Trật tự hai cực I-an-ta sụp đổ năm 1991 đã

Bao nhiêu hạt proton thì có tổng khối lượng là 1 gram?

Số 123.75 đang ở hệ thập phân khi đổi sang hệ nhị phân sẽ cho kết quả như thế nào?

Trong điều kiện lý tưởng, giống lúa A cho năng suất tối đa là 10,5 tấn/ha, trong khi đó giống lúa B chỉ cho năng suất tối đa là 6 tấn/ha. Điều này cho thấy vai trò của nhân tố nào đối với năng suất cây trồng?

Read the passage below and choose A, B, C or D.

Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.

Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection. Noise causes effects that the hearer cannot control and to which the body never becomes  accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.

Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America's number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.

What is the main topic of the first paragraph?

Các ngành công nghiệp ở nông thôn phát triển mạnh dựa trên thế mạnh nào sau đây?

Read the following advertisement and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6.

Discover Our Luxurious Eco-Friendly Yoga Mats!

Are you looking for the (1)________yoga mat? 

 Our mats are made from natural materials that are not only sustainable but also incredibly durable.

Experience the comfort of our thick blue (2)_________. It provides the perfect surface for all your yoga needs, whether you’re a beginner or an expert.

Many customers have shared how our mats have transformed their practice, (3)__________ them to achieve greater balance and flexibility. Join our community and see the difference! You can show yoga (4)________your friends with our mats every day.

(5)_________advantage of this opportunity to enhance your yoga experience!

Loving (6)_________ yoga is essential for maintaining a healthy lifestyle, and using our mats will help you achieve that.

Acetylsalicylic acid (thuốc Aspirin) có công thức cấu tạo như hình bên. Phát biểu nào sau đây là không đúng?

Một người có thể bơi với vận tốc 2,5 m/s khi nước sông không chảy. Khi nước sông chảy với vận tốc 1,2 m/s theo hướng bắc nam thì sẽ làm thay đổi vận tốc của người bơi. Tìm vận tốc tổng hợp của người đó khi bơi ngược dòng chảy. 

Read the following passage about lifelong learning and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

[I] Lifelong learning is the ongoing, voluntary, and self-motivated pursuit of knowledge for personal or professional development (Knowles, 2020). [II] This concept emphasizes that learning does not stop after formal education, but rather continues throughout an individual's life, adapting to changing circumstances and needs. [III] In today’s fast-paced world, where technology and job markets evolve rapidly, lifelong learning has become increasingly essential. [IV]

One of the primary benefits of lifelong learning is its ability to enhance employability. Individuals who engage in continuous education are more likely to keep their skills relevant and competitive in the job market. According to a report by the World Economic Forum (2021), over 50% of employees will need reskilling due to technological advancements in the coming years. Lifelong learners are better equipped to adapt to these changes, making them more attractive candidates for employers.

Moreover, lifelong learning contributes to personal fulfillment and mental well-being. Engaging in new learning experiences can stimulate the brain, foster creativity, and improve cognitive function. Research indicates that individuals who pursue learning opportunities throughout their lives tend to report higher levels of happiness and life satisfaction (Smith & Johnson, 2019). Whether it is taking a course, learning a new language, or picking up a new hobby, the process of acquiring knowledge can be enriching and enjoyable.

In addition, lifelong learning promotes social engagement and community involvement. Participating in educational programs or community workshops can foster connections with others who share similar interests. This social aspect of learning can enhance one's sense of belonging and support networks, which are crucial for mental health (Jones, 2022).

Overall, lifelong learning is not just an individual responsibility; it requires support from educational institutions, employers, and communities to create an environment conducive to continuous education. By fostering a culture of learning, society can better prepare individuals for the challenges of the future and ensure that everyone has the opportunity to thrive.

(Adapted from The Importance of Lifelong Learning by Knowles, Smith, Johnson, and others)

The word "it" in paragraph 5 refers to ____.

Cho biết: Màng nào chứa ít cholesterol và cao cardiolipin?

Mã nhị phân của kí tự [X] trong bảng mã ASCII là 01100110. Kí tự [X] là

(Gợi ý: D = 68; f = 102; E = 69; l = 108)

Read the following leaflet and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 7 to 12.

Boosting Your Confidence

Looking to improve your self-esteem and feel more confident in your daily life? Here’s how you can make positive changes!

Confidence Facts: Studies show that only 35% of people report feeling confident in their abilities, while others ___(7)___ with self-doubt. Building confidence can help improve your performance at work and in social situations.

Tips to Boost Your Confidence:

● Set realistic goals! Start small and ___(8)___ yourself when you reach milestones.

● Surround yourself with positivity! Seek ___(9)___ supportive friends and colleagues to boost your self-esteem.

● Focus on your strengths! ___(10)___ dwelling on mistakes, concentrate on what you do well.

● Practice self-care! Taking time for yourself can ___(11)___ your mood and confidence levels.

● Keep learning! Gaining new skills helps ___(12)___ a sense of accomplishment.

Lợi ích cơ bản mà công dân được hưởng, được Nhà nước bảo vệ và đảm bảo theo Hiến pháp, pháp luật là gì?

Trường hợp nào sau đây, lực có tác dụng làm cho vật rắn quay quanh trục ?

Cho bảng số liệu tỉ suất sinh và tỉ suất tử của một số quốc gia Đông Nam Á năm 2022 (nguồn World Bank, 2023):

Dựa vào bảng số liệu, nhận xét nào sau đây đúng về tỉ lệ gia tăng dân số tự nhiên của một số quốc gia Đông Nam Á năm 2022?