Nguyên tử nguyên tố Potassium (K) có 19 proton và 20 nơtron. Khối lượng gần đúng của nguyên tử K là (biết m_e = 0,00055 amu; m_p = 1 amu; m_n = 1 amu)

Khi tế bào cần tăng cường tổng hợp protein, cấu trúc nào sau đây sẽ hoạt động mạnh mẽ hơn?

Tìm số hạng chứa \(x^{31}\) trong khai triển \(\left(x+\frac{1}{x^{2}}\right)^{40}\).

Trong một nguyên tử, số proton

Để xác định phụ nữ có thai hay không, người ta dùng que thử thai để xác định sự có mặt của loại hormone nào sau đây?

Read the following passage 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 23 to 30.

SCREEN TIME: MENTAL HEALTH MENACE OR SCAPEGOAT?

    "Have smartphones destroyed a generation?" Jean Twenge - a psychology professor at San Diego State University - asked in her controversial book, iGen. In the book, she argues that those born after 1995 are facing "a mental-health crisis", and she believes it can be linked to growing up with their noses pressed against a screen. Her newest study provides more support for that connection, showing that teens who spent more than an hour or two a day interacting with their gadgets were less happy on average than those who had more face time with others.

    Twenge's conclusions have come up against criticism in the past. Some have accused her work of oversimplifying or overlooking data that may tell a slightly different story. Twenge recognises that her study suggests only a link between screen use and psychological well-being. A possible explanation is that kids are running to their screens to escape from the things in life that are making them unhappy. However, the surveys can't say whether screen time directly changes teens' mental health, the research states.

    Philanthropist Melinda Gates, whose three children were also born after 1995, wrote in The Washington Post, "phones and apps aren't good or bad by themselves, but for adolescents who don't yet have the emotional tools to overcome life's problems, they can aggravate the difficulties of growing up."

    At the same time, she said, kids are learning on their devices and connecting in novel ways. Other studies have explored the connection between social media and isolation and how "likes" activate the brain's reward centre. Some analyses have found that moderate use of these technologies is not harmful in itself and can even improve children's social skills and build emotional strength.

The word aggravate in paragraph 3 is closest in meaning to ____

Read the passage carefully

1. No matter who we are or where we are from, we only have 24 hours each day to get things done. Some people seem to make the most of their time, using it to achieve their goals and dreams. Others feel that life is passing them by and they aren’t accomplishing anything. If you are in the latter group, it is not too late to turn things around. By implementing a few simple hacks, you can start getting better results very quickly.

2. If you want to become more productive, it pays to learn about the Pareto principle (which is also known as the 80-20 rule). It states that for most tasks, 80 percent of the results we get come from 20 percent of the work we do. For example. 80 percent of the company sales usually come from 20 percent of customers. Therefore, the trick is to focus your efforts on the key 20 percent of actions that truly matter to greatly improve your results.

3. In some cases, people may be busy from morning to night but still seem to get nothing done. In this situation, the problem might be that clear goals haven’t been set. To fix this, set some time aside to list the things you want to achieve in life. Then, select the top three or four that you want to focus on for the next year. Look at your goals every night before bedtime and ask yourself what are the next actions to accomplish each day. Then, promise yourself that you will finish these tasks no matter how busy you get. If possible try completing the tasks first thing in the morning so you are assured of success.

4. Another common mistake regarding productivity is not considering our energy levels. If we try to work around the clock, we will eventually get tired and quit. Everyone needs time to sleep, eat, socialize with friends, and unwind from the stress of the day. To make sure you don’t burn out, be sure to schedule some time for breaks and fun activities into your schedule every day. Finally, no matter how difficult your goals may seem, remember the old saying that “a journey of a thousand miles begins with a single step”.

What should we do in order to achieve our goals?

Giá trị của giới hạn \(\mathop {\lim }\limits_{x \to \sqrt 3 } \left| {{x^2} - 4} \right|\) là

Phương hướng chiến lược của quân đội và nhân dân Việt Nam trong Đông - Xuân 1953 1954 là gì?

Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17.

a. For example, behaviors that are acceptable in one culture, such as direct eye contact, may be considered impolite in another.

b. At first, people may feel excited about exploring a new culture, but this initial enthusiasm often fades as they begin to notice differences in language, customs, and social norms.

c. Culture shock, which occurs when individuals struggle to adapt to a foreign culture, is a common experience for travelers and expatriates.

d. This period of adjustment can be challenging, but it ultimately helps individuals develop a deeper understanding of and respect for cultural diversity.

e. Such differences can lead to feelings of frustration, confusion, or even isolation for newcomers.

Nước ta nằm trong vùng nội chí tuyến bán cầu Bắc nên có

Nội dung về việc chưa thực hiện tốt quy định của Hiến pháp về chủ quyền, lãnh thổ là gì?

Những hành vi vi phạm quyền và nghĩa vụ của công dân trong tham gia quản lý nhà nước và xã hội sẽ gây ra hậu quả như thế nào đối với cơ quan nhà nước?

Sự khác biệt cơ bản giữa Chiến tranh lạnh với các cuộc chiến tranh thế giới đã qua là

Phương pháp thu thập dữ liệu là:

Biết nhiệt nóng chảy riêng của băng là 3,34.10⁵ J/kg. Nhiệt lượng cần để làm nóng chảy hoàn toàn 3 kg băng là

Nguyên nhân của hiện tượng biển tiến, biển thoái là do đâu?

Khu vực nào ở Mỹ Latinh thường xảy ra động đất?

Gồm 1 - 2 xí nghiệp riêng lẻ, phân bố gần vùng nguyên nhiên liệu và đồng nhất với một điểm dân cư là đặc điểm nổi bật của tổ chức lãnh thổ nào?

Trường hợp các câu trong đoạn không tập trung vào một chủ đề hoặc nội dung nêu trong câu chủ đề không được triển khai đầy đủ trong đoạn văn là lỗi gì?