Chất phóng xạ \({}_6^{14}C\) có chu kỳ bán rã là T. Ban đầu có một mẫu \({}_6^{14}C\)nguyên chất với khối lượng 4g. Sau khoảng thời gian 2 chu kỳ liên tiếp, khối lượng chất \({}_6^{14}C\) trong mẫu đã bị phân rã là

Mark the letter A, B, C or D on your answer sheet to Indicate the best arrangement of utterances or sentences to make a cohesive and coherent exchange or text In each of the following questions from 15 to 19. 

a. Marvelli has now become a more dynamic and prosperous city, offering greater opportunities for both residents and investors.

b. These vital improvements have notably boosted Marvell's economy, fostering the growth of local businesses and attracting foreign investment.

c. To accommodate this growth, city planners have replaced the older terraced housing with modern high-rise buildings and expanded public facilities such as schools and hospitals.

d. Recognising the increasing traffic congestion, the city council has had the main roads widened and an intelligent traffic monitoring system installed to optimise traffic flow.

e. Over the past decade, the city of Marvelli has undergone a considerable transformation, experiencing an upsurge in population and an overload on the existing transport infrastructure.

Có mấy loại hệ thống kĩ thuật?

► Câu hỏi trắc nghiệm nhiều phương án lựa chọn

Dân số nước ta hiện nay

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 is the word “accomplishing” in the first paragraph closest in meaning to?

Auxin có vai trò như thế nào?

The government should take measures to reduce air pollution and encourage __________ to use eco-friendly vehicles.

"Biết tạo ra sự khác biệt trong ý tưởng kinh doanh, và phân tích được cơ hội và thách thức trong công việc kinh doanh của bản thân". Đó là biểu hiện cho năng lực nào của người kinh doanh?

Quyền tham gia quản lí nhà nước và xã hội, tham gia thảo luận và kiến nghị với các cơ quan nhà nước về các vấn đề của cơ sở, địa phương và cả nước thuộc nhóm quyền nào của con người quy định trong Hiến pháp 2013?

Vua Lê Hiến Tông (1497 – 1504) đã viết: “Nhân tài là nguyên khí của nhà nước, nguyên khí mạnh thì trị đạo mới thịnh. Khoa mục là đường thẳng của quan trường, đường thẳng mở thì chân nho mới có”. Câu nói này thể hiện điều gì?

Trong biểu thức logic, phép toán nào chỉ đúng khi cả hai mệnh đề đều đúng?

Tiêu dùng tác động đến sản xuất theo mấy hướng?

Trong đồ họa vectơ, hình ảnh được xác định theo yếu tố nào?

Một trong những di sản văn hóa phi vật thể tiêu biểu của Việt Nam là:

Hi Alex,

a. Thanks to your guidance, I feel much more confident about presenting the project now, and I’m really proud of what we were able to accomplish together.

b. I really hope we’ll have the opportunity to collaborate again on another project in the near future, as I found working with you to be both inspiring and highly productive.

c. Please let me know if you have availability for any upcoming collaborations - I would be delighted to work with you again.

d. I wanted to take a moment to sincerely thank you for all the invaluable help and support you provided with the project last week.

e. Your thoughtful suggestions and detailed feedback truly made a significant difference, and I believe they played a key role in improving the overall quality and success of the final outcome.

Best,

Catherine