Hình bên mô tả thí nghiệm về hiện tượng cảm ứng điện từ. Khi tăng tốc độ di chuyển thanh nam châm, dòng điện trong ống dây

 

Có bao nhiêu giá trị nguyên của tham số \(m\) trong đoạn \([-10 ; 10]\) sao cho đồ thị hàm số \(y=x^{3}\) cắt đường thẳng \(y=3 m x-m^{2}\) tại ba điểm phân biệt?

Cho các mệnh đề dưới đây:

(1) 24 là số nguyên tố.

(2) Phương trình $x^2 -5x+9=0$ có 2 nghiệm thực phân biệt.

(3) Phương trình $x^2+1=0$ có 2 nghiệm thực phân biệt.

(4) Mọi số nguyên lẻ đều không chia hết cho 2.

Trong các mệnh đề trên, có bao nhiêu mệnh đề đúng?

Số nghiệm nguyên của bất phương trình \(2{x^2} - 3x - 15 \le 0\) là?

Trong các câu sau, câu nào là mệnh đề?

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. 

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• ___(3)___ experience required

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• Meet and learn from ___(4)___ authors. Register now ___(5)___ information.

• Email: writershub@literature.com

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Cấu hình electron của nguyên tử nguyên tố X có dạng (Ne)3s²3p³. Phát biểu nào sau đây là sai?

Chủ thể nào dưới đây có hành vi vi phạm đạo đức trong quá trình kinh doanh?

Read the following passage about education in Nepal 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.

An education pioneer born into rural poverty in Nepal has opened 30 schools in a bid to boost prospects for his country's children.

The World Bank ranks Nepal as the globe's 31st poorest country, with almost 10 million people living on daily incomes between £1.48 and £2.50. Many rural villages remain unreached by government schooling and adult literacy stood at just 60 per cent in 2011.

Surya Karki and his charity United World Schools Nepal (UWS) are tackling high illiteracy and poverty rates by funding and improving education.

The first school opened in 2015 – since then 92 per cent of children have completed primary education, which finishes at age eight, and continued into secondary education with UWS schools. In comparison to 39 per cent of students continuing education who attended government schools.

Mr Karki was born into poverty in rural Nepal. Speaking to the Telegraph he said: “School is the only solution to the poverty cycle that we live in. I was raised by a single mother in a male-dominated society.

“The school that I went to was approximately two hours walk away. My house was on top of a hill and my mother had to drag me across rivers. We used to walk 10 miles a day. The schooling was really bad.”

Of the students who would go to school, he said: “They would end up in the same place, as cheap migrant workers in Qatar, Saudi, or Dubai. There was no value in education – no success stories.”

[A] Karki’s mother was a firm believer in education, and at age eight Karki secured a scholarship to study in the capital, Kathmandu. [B] From there he won scholarships and completed Masters degrees in China and the United States. [C] Karki said. “Inequalities in a country can only be decreased if there is access to knowledge.” [D]

The devastating earthquake in 2015 damaged 9,300 schools, displacing hundreds of thousands of families and pushing 700,000 people into poverty. As of January 2018, only 2,891 schools had been rebuilt. Karki said: “We came at a crucial time, where we could redo or undo what had been done badly. Education was really bad in terms of infrastructure, quality of teachers, training. It was an opportunity for us to really make things better.”

UWS Nepal has so far built 30 schools and has seven more in construction. The schools run between 10 am and 3:30 pm, and have an 86 per cent average attendance rate, which Karki says is almost double the attendance rates for government schools in the vicinity. Sexual health classes are taught to the children in the later years.

The word “tackling” in the passage is closest in meaning to _______.

Khi hoà tan sodium carbonate (\(Na_2CO_3\)) vào nước, quá trình sau đây xảy ra:

\(CO_3^{2-} + H_2O \rightleftharpoons HCO_3^- + OH^-\)

Theo thuyết Brønsted - Lowry, ion \(CO_3^{2-}\) đóng vai trò gì trong quá trình trên?

Đặc điểm nào sau đây không thuộc khởi nghĩa Phan Bá Vành (1831 – 1827)?

Ngày 20-11-1873, ở Bắc Kì đã diễn ra sự kiện lịch sử gì?

Chọn câu đúng:

Cho tam giác \(ABC\) có trọng tâm \(G\), gọi \(M\) là trung điểm \(BC\). Phân tích vectơ \(\overrightarrow{AG}\) theo hai vectơ là hai cạnh của tam giác. Khẳng định nào sau đây đúng?

Nhận định nào đúng với tình hình phát triển kinh tế của Liên bang Nga?

Cho các quá trình biến đổi sau:

(1) Nước sôi bay hơi.

(2) Nhúng đinh sắt vào dung dịch acid chloride thấy sủi bọt khí, đinh sắt tan dần.

Khẳng định đúng là

Một thùng hàng có khối lượng \(20kg\) được đẩy lên 1 con dốc cao \(3m\) bằng động cơ băng truyền. Biết trong cả quá trình vận chuyển, động cơ cần sử dụng năng lượng tổng cộng là \(4000J\). Lấy \(g=10m/s^2\). Hiệu suất của động cơ là bao nhiêu %?

Đâu không phải là phương pháp thường được áp dụng trong nghiên cứu sinh học?

Theo em, mùi vị của món ăn ngon mẹ nấu cho em ăn là thông tin dạng nào?

Vị trí địa lý của Hoa Kì về phía Đông thuận lợi giao lưu với các nước khu vực nào?

Read the following passage about the Reimagining International Cooperation 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.

Global environmental governance is changing how countries work together. Nations now understand that pollution, climate change, and resource problems cross borders. Traditional agreements between countries are not enough anymore. New approaches include businesses, local communities, and citizen groups working with governments. This all-hands-on-deck approach helps create better solutions for our planet. Many successful projects show that when different groups cooperate, they can solve difficult environmental problems that single countries cannot fix alone.

Environmental governance faces many challenges today. [I] Political differences between nations often slow down important decisions. [II] Some countries worry that strict environmental rules might hurt their economic growth. Despite these obstacles, new technologies are helping countries monitor environmental changes better. [III] Satellite data and computer models allow scientists to track forest loss, ocean pollution, and climate patterns. [IV] This information helps leaders make smarter decisions about protecting natural resources.

The future of environmental governance depends on innovation. Digital platforms now connect environmental experts around the world instantly. Young people are bringing fresh ideas through social media campaigns and protest movements. Indigenous communities contribute valuable traditional knowledge about sustainable living practices. Financial institutions are creating new ways to fund green projects in developing countries. These combined efforts are creating a more flexible and responsive system of global cooperation that can adapt to changing environmental conditions more quickly than old-fashioned diplomatic channels.

Effective environmental governance requires balance between global standards and local solutions. While international agreements provide important frameworks, communities need freedom to implement approaches that fit their unique situations. Successful governance models respect cultural differences while maintaining scientific standards. Education plays a crucial role in building public support for environmental policies. When citizens understand environmental issues, they make better choices and hold their leaders accountable. The most promising path forward combines strong international institutions with energetic local action to create lasting environmental solutions.

Which of the following is NOT mentioned as a challenge to environmental governance?