Nguyên tử lithium có 3 proton và 4 neutron. Kí hiệu nguyên tử của nguyên tố này là

Choose the correct answer.

My mother usually _____ more housework than my father does.

Biển Ban-tích, biển đen và biển Ca-xpi nằm ở khu vực nào của Liên bang Nga?

Vì sao để nhân giống cây ăn quả lâu năm người ta thường chiết cành?

Bệnh nào thường gặp ở trâu, bò cái sinh sản, nhất là bò sữa cao sản và trong điều kiện nóng ẩm?

Nguyên tử Helium (He) có 2 proton và 2 neutron. Số khối của He là

Chu Văn Sơn là nhà nghiên cứu văn học Việt Nam giai đoạn nào?

Trong giao diện chỉnh sửa video, thành phần nào chứa các lệnh như sao chép, xoá và các lệnh căn chỉnh đối tượng khác?

Dùng câu lệnh print và kí tự nào để viết được đoạn văn xuống dòng giữa xâu?

Đáp án nào không đúng về hình ảnh “cô chu” trong bài thơ Cảm xúc mùa thu của Đỗ Phủ?

Ngành nào sau đây là thuộc lĩnh vực khoa học xã hội và nhân văn?

Bước 2 của quy trình thiết kế kĩ thuật là:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27:

People come to this small country for many reasons. They can admire spectacular (23)_________ meet friendly natives, and enjoy a vibrant arts scene. Some are searching for their family (24) _________ or others just want to get away from it all and, digging up old memories from their English Lit class of gallant heroes engaging in larger-than-life struggles, their minds wander to faraway lands, to somehow familiar yet different destinations. Why not go to Scotland? But what kind of country are they coming to and what should they expect once they get there? Scotland (25) _________ of an area of 30, 418 square miles - so it's a fairly compact and "doable" country - with a population of about five million people - not too small, not too big. It is one of three countries that form the political (26) _________ called Great Britain, the other two being, of course, England and Wales, which, along with their fourth partner, Northern Ireland, becomes the United Kingdom. Scotland is bordered on three sides by water and on its fourth by England, which has had both its advantages and disadvantages. Geographically speaking, the country can be divided into three broad areas, the Southern Uplands, the Central Lowlands, and the Highlands. Although the rugged Highlands (27) _________ about two-thirds of the land area, the vast majority of the population lives in the Central Belt between Glasgow, Scotlands largest city, and Edinburgh, Scotland's capital.

Bệnh đạo ôn hại lúa:

a. Daniel: Exactly. If we keep taking too many, there won't be any fish left.

b. Minh: My dad told me that some kinds of fish are disappearing.

c. Minh: So the fish don't have time to have babies and grow.

d. Minh: We need to be more careful about how many we catch.

e. Daniel: Oh, that's because of overfishing. We catch too many.

Tập hợp $X$ gồm các số tự nhiên chia cho $2$ dư $1$ là

Cho tam giác \(ABC\) và điểm \(M\) thỏa mãn điều kiện \(\overrightarrow {MA}  - \overrightarrow {MB}  + \overrightarrow {MC}  = \overrightarrow 0 \). Mệnh đề nào sau đây sai? 

Read the following passage about the Pathways from Today's Actions to Tomorrow's World 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.

As we stand at the crossroads of environmental decision-making, the actions we take today will shape our world in 2050. Scientists warn that we're skating on thin ice with current consumption patterns and carbon emissions. Global temperatures could rise by 2-4 degrees Celsius unless significant changes occur within the next decade. Many countries have pledged to achieve carbon neutrality by 2050, but these promises require immediate implementation. Individual choices in transportation, energy usage, and consumption can collectively influence whether future generations inherit a sustainable planet or face severe climate consequences.

[I] Technological innovation represents our greatest hope for addressing environmental challenges by 2050. [II] Renewable energy sources like solar and wind are becoming increasingly affordable, potentially replacing fossil fuels entirely within thirty years. [III] Electric vehicles may dominate transportation networks, while vertical farming could transform food production in urban areas. [IV] However, these technological solutions must be developed and deployed equitably to avoid creating new disparities between wealthy and developing nations.

Social structures will undergo dramatic transformation by 2050 as demographic shifts reshape communities worldwide. Aging populations in developed countries will necessitate new approaches to healthcare, retirement, and social support systems. Meanwhile, climate migration may force millions to relocate from vulnerable coastal and drought-prone regions. Education systems must evolve to prepare our students for jobs that don't yet exist, emphasizing their adaptability and lifelong learning. Cities will need to become more resilient, incorporating green spaces and sustainable infrastructure to support growing populations.

Economic models must fundamentally change by 2050 to balance prosperity with environmental responsibility. The traditional focus on continuous growth may shift toward measuring success through wellbeing indicators rather than GDP alone. Circular economy principles will likely replace linear production models, with products designed for reuse and recycling. Resource-sharing platforms may become more prevalent, reducing individual consumption while maintaining living standards. Companies implementing genuinely sustainable practices will thrive, while those clinging to environmentally harmful methods may disappear entirely. The transition presents both challenges and opportunities for businesses willing to embrace innovation and sustainability.

The word “their” in paragraph 3 refers to _________.

Chế độ nước sông theo mùa do tác động của nhân tố chủ yếu nào sau đây ở nước ta?