Cho tập hợp $A = \left\{ {x \in {\mathbb{N}^*},x < 10,\,\,x \vdots 3} \right\}$. Chọn khẳng định đúng

Chọn cặp từ/ cụm từ thích hợp nhất điền vào chỗ trống.

Việc chuyển đổi từ đĩa nhựa sang các tập tin kỹ thuật số bắt đầu vào khoảng năm 2000, _____ là dưới hình thức tải xuống và _____ là phát trực tuyến, có vẻ như là một sự thay đổi đáng hoan nghênh.

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 31 to 40.

Biting into a ripe, juicy fruit brings a smile to many people’s faces. But eating that same fruit a week before it is ripe probably wouldn’t be as enjoyable! Unripe fruits are often hard and bitter, but that serves a purpose. The hard exterior of an unripe fruit protects the developing seed inside. After a seed fully develops inside the fruit, the fruit changes color, softens, and gets sweeter to become more attractive to animals and humans. These organisms eat the fruit and spread its seeds, ensuring the plant’s survival and regrowth.

But how does a fruit ripen? The ripening process involves many complex chemical reactions. When a fruit ripens, it goes through a chemical change. A chemical change happens when bonds within molecules break, and the atoms that once formed them regroup into new molecules. Chemical changes are irreversible. Once a fruit ripens, it cannot become unripe again.

One molecule responsible for this chemical change is ethylene. Ethylene (C2H4) is a colorless gas made up of carbon and hydrogen atoms. (I). It is a naturally occurring molecule in the atmosphere. (II). It is also an important plant hormone. (III). Plants release ethylene through the growing tips of roots, flowers, and ripening fruit. (IV). Although ethylene serves other purposes in plants, one of its main purposes is to trigger the chemical reactions that cause fruits to ripen. As the fruit matures, oxygen in the air helps stimulate the production of ethylene. This ethylene production is a signal that begins fruit ripening. For that reason, unripe fruits have low levels of ethylene, while ripe fruits have higher levels of ethylene. Most fruits produce ethylene and respond to ethylene in the atmosphere.

Although fruits require ethylene to ripen, different types of fruits respond to this molecule in two distinct ways: non-climacteric fruits and climacteric fruits. Non-climacteric fruits do not ripen after harvesting. They produce very little ethylene of their own. Climacteric fruits, on the other hand, continue to ripen after they are picked. These fruits produce a large amount of ethylene. Climacteric fruits can also speed up the ripening process of other fruits nearby since they release high levels of ethylene into the air.  

Which of the following best summarizes paragraph 4?

Cho giá trị thế điện cực chuẩn của một số cặp oxi hoá - khử:

\(E_{F{{e}^{2+}}/Fe}^{0}=-0,44~\text{V};E_{Z{{n}^{2+}}/Zn}^{0}=-0,76~\text{V};E_{C{{u}^{2+}}/Cu}^{0}=0,34~\text{V};E_{A{{g}^{+}}/Ag}^{0}=0,8~\text{V}\).

Hãy cho biết ion nào có thể oxi hoá được kim loại Fe.

At companies like Facebook, Amazon, Apple, Netflix and Google, they help to develop long-term plans and digital __________.

Read the following passage about Global Challenges Requiring Diverse Solutions 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 18 to 22.

Climate change affects everyone on our planet, but different communities experience its impacts in unique ways. (18)_________. This traditional wisdom, which connects deeply with nature, can help us find better solutions to environmental problems. If we had started addressing climate change earlier, many environmental disasters could have been prevented. The effects of global warming are now visible in many regions around the world, from melting ice caps to increasing droughts and floods. These changes threaten not only ecosystems but also cultural practices tied to specific environments. Many coastal communities (19)_________, and ancient cultural sites are being damaged by extreme weather events. When diverse communities work together, sharing their unique perspectives and knowledge, innovative climate solutions emerge. Different cultural approaches to agriculture, water conservation, and energy use can inspire new ways of thinking about sustainability. Climate solutions must be culturally appropriate; (20)_________. By combining traditional wisdom with modern science, we create more effective strategies for addressing climate challenges. Communities around the world are already implementing these multicultural approaches, demonstrating (21)_________. People want immediate action on climate change; however, governments often move slowly on environmental policies. Scientists study climate patterns and develop new technologies, (22)_________. The path forward requires collaboration across cultures, disciplines, and borders. Only through inclusive dialogue and shared responsibility can we build a sustainable future that honors both human diversity and our common home.

Kí hiệu nào viết đúng về mệnh đề: “\(\sqrt 5 \) không là số nguyên”?

Trong hệ tọa độ \(Oxy\), cho \(\overrightarrow u = \frac{1}{2}\overrightarrow i - 5\overrightarrow j \). Khi đó \(\overrightarrow u = \left( {a;b} \right)\). Tính \(a + b\).

Provide the correct form of the verb in brackets.

A: Where's Tom?

Tình trạng thiếu nước ngọt vào mùa khô ngày càng nghiêm trọng ở vùng Đồng bằng sông Cửu Long là do

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.

Hello Ethan,

d. Your suggestion for the nature magazine was perfect; it has really broadened my understanding.

b. I hope you’re having a great day!

a. They were incredibly interesting! While I’m currently focused on improving my nature photography skills, I did find the documentaries enlightening.

c. Let’s catch up soon; I’d love to share my recent photos with you!

e. I wanted to say how much I appreciated the wildlife documentaries you sent me last week. Best regards,

Chloe

Hoạt động nào sau đây không phải hoạt động sản xuất?

Cấu trúc hệ thống pháp luật bao gồm những gì?

Cuộc cách mạng công nghiệp lần thứ tư còn có tên khác là gì?

Hiện tượng tỉa cành tự nhiên thể hiện đặc điểm nào của các cấp tổ chức sống?

Để ghi nhận lại đặc điểm về cơ quan sinh dưỡng và cơ quan sinh sản của thực vật, từ đó tiến hành phân loại thực vật cần sử dụng phương pháp nghiên cứu Sinh học nào sau đây?

Cứ 7 năm tại vùng biển Pêru xuất hiện dòng nước nóng Nino làm cá cơm chết hàng loạt, đây là loại biến động gì?

Land erosion is mainly caused by widespread deforestation.