Cho các nguyên tử sau: B (Z = 8, A = 16), D (Z = 9, A = 19), E (Z = 8, A = 18), G (Z = 7, A = 15). Trong các nguyên tử trên, các nguyên tử nào thuộc cùng một nguyên tố hoá học?

Thế nào là phát triển ở thực vật?

Cho biết: Công dụng làm các thiết bị trang trí bằng bảng điện tử của mạch điều khiển tín hiệu là?

Cho biểu thức logic NOT(x) XOR NOT(y) như bảng sau. Em hãy cho biết kết quả nào sai?

Nguyên nhân khiến số người mắc và tử vong vì ung thư ở Việt Nam tăng nhanh là gì?

I.  Ô nhiễm môi trường sống làm phát sinh nhiều tác nhân đột biến.

II. Thói quen ăn uống không khoa học

III. Thói quen sinh hoạt không lành mạnh

IV. Sự chênh lệch tỉ lệ giới tính

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions:

            For many people who live in cities, parks are an important part of the landscape. They provide a place for people to relax and play sports, as well as a refuge from the often harsh environment of a city. What people often overlook is that parks also provide considerable environmental benefits.

            One benefit of parks is that plants absorb carbon dioxide - a key pollutant - and emit oxygen, which humans need to breathe. According to one study, an acre of trees can absorb the same amount of carbon dioxide that a typical car emits in 11,000 miles of driving. Parks also make cities cooler. Scientists have long noted what is called the Urban Heat Island Effect: building materials such as metal, concrete, and asphalt absorb much more of the sun’s heat and release it much more quickly than organic surfaces like trees and grass. Because city landscapes contain so much of these building materials, cities are usually warmer than surrounding rural areas. Parks and other green spaces help to mitigate the Urban Heat Island Effect.

            Unfortunately, many cities cannot easily create more parks because most land is already being used for buildings, roads, parking lots, and other essential parts of the urban environment. However, cities could benefit from many of the positive effects of parks by encouraging citizens to create another type of green space: rooftop gardens. While most people would not think of starting a garden on their roof, human beings have been planting gardens on rooftops for thousands of years. Some rooftop gardens are very complex and require complicated engineering, but others are simple container gardens that anyone can create with the investment of a few hundred dollars and a few hours of work.

            Rooftop gardens provide many of the same benefits as other urban park and garden spaces, but without taking up the much-needed land. Like parks, rooftop gardens help to replace carbon dioxide in the air with nourishing oxygen. They also help to lessen the Urban Heat Island Effect, which can save people money.

            In the summer, rooftop gardens prevent buildings from absorbing heat from the sun, which can significantly reduce cooling bills. In the winter, gardens help hold in the heat that materials like brick and concrete radiate so quickly, leading to savings on heating bills. Rooftop vegetable and herb gardens can also provide fresh food for city dwellers, saving them money and making their diets healthier. Rooftop gardens are not only something everyone can enjoy, they are also a smart environmental investment.

Question 38: Based on the information in paragraph 3, which of the following best describes the main difference between parks and rooftop gardens?

Nghiên cứu, sản xuất thuốc chữa bệnh là hoạt động nghề nghiệp của ngành nào?

Choose A, B, C or D to make a complete dialogue for each question.

a. Many people feel that way, but once you’re in the air, it’s exhilarating!

b. Most companies have excellent safety records, and you’ll be with a qualified instructor.

c. That’s true, but what if something goes wrong during the jump?

d. I’ve always wanted to try skydiving, but I’m unsure if I can handle the height.

Tập hợp $P=\Big\{ x \in \mathbb{R} \, \big| \, -1< 2x+1 \le 11\Big\}$ được viết lại dưới dạng đoạn, khoảng, nửa khoảng là

Một vật rơi tự do, trong 4 s cuối cùng rơi được 320 m. Tính thời gian rơi của vật. Lấy \[g = 10m/{s^2}\]

Tìm hệ số của \(x^{4}\) trong khai triển \(P(x)=\left(1-x-3 x^{3}\right)^{n}\) với \(n\) là số tự nhiên thỏa mãn hệ thức \(C_{n}^{n-2}+6 n+5=A_{n+1}^{2}\).

Mệnh đề phủ định của mệnh đề $P$: "$\sqrt{2} \le 2$" là

Các đối tượng có thể có trong phim hoạt hình là?

Khi lập kế hoạch tài chính cá nhân chúng ta cần chú ý điều gì?

Một chất điểm dao động điều hòa trên trục Ox có phương trình x = 8cos(πt + π/4) (cm). Gốc tọa độ ở vị trí cân bằng. Gốc thời gian (t = 0) được chọn lúc chất điểm có li độ và vận tốc là:

Mệnh đề phủ định của mệnh đề "$\forall x \in \mathbb{R}: \, x^2>x$" là

Đâu là ý đúng: Sợi cacbon nano?

Mệnh đề nào sau đây đúng?

Read the following passage about Innovation Driven by Environmental Need 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.

Green startups have emerged as forces for positive environmental change. These companies create sustainable solutions for urgent ecological challenges. Unlike traditional businesses prioritizing profits, green startups balance financial goals with environmental responsibility. Many were founded by young entrepreneurs who witnessed environmental degradation and felt compelled to act. Their mission extends beyond making money; they aim to heal our planet while building successful businesses.

Eco-friendly startups have grown across various sectors. From renewable energy and sustainable agriculture to zero-waste products, these companies revolutionize how we interact with our environment. GreenWave developed ocean farming requiring no fertilizers while capturing carbon. Notpla created edible packaging from seaweed as a plastic alternative. These innovations show how creativity and environmental consciousness produce extraordinary results. Their success proves sustainability and profitability can coexist.

Funding for green startups has increased in the past decade. Investors recognize supporting environmentally responsible businesses is both ethical and financially prudent. Venture capitalists have established funds dedicated to sustainable startups, providing capital to scale operations. Government grants have become more accessible to entrepreneurs developing green technologies. Despite positive developments, green startups still face regulatory hurdles and competition from established industries resistant to change.

The future looks promising for environmental businesses as consumers shift toward sustainable products. Studies show modern consumers, particularly younger generations, will pay premium prices for eco-friendly alternatives. This trend creates fertile ground for green startups to thrive. As climate concerns intensify, demand for innovative environmental solutions will grow stronger. Green startups are positioned to meet this demand while driving positive change, demonstrating business innovation and environmental stewardship can create a sustainable world.

In which paragraph does the writer mention how green startups obtain financial support?

Đối với động cơ xăng 4 kì, ở kì nạp, xi lanh sẽ hút: