Em hãy cho biết hô hấp có liên quan như thế nào với các hoạt động sống của tế bào và cơ thể?

Muốn kết nối với Internet phải sử dụng các dịch vụ của nhà cung cấp dịch vụ kết nối. Đâu không phải là nhà cung cấp dịch vụ Internet:

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.

UNBREAKABLE SPIRIT: AN EVENING WITH NICK VUJICIC

We are thrilled to announce that (1) ______ Nick Vujicic will be visiting our community for an exclusive seminar (2) ______ to inspire, empower, and create lasting change. This once-in-a-lifetime event will offer attendees the opportunity to hear Nick's powerful story of resilience, faith, and perseverance firsthand. Born without limbs, Nick has transformed his circumstances into a source of (3) ______. He has spoken to millions of people around the globe, spreading messages of hope, and the courage to turn obstacles (4) ______ opportunities. Nick’s dynamic and engaging approach has (5) ______ a lasting impact on audiences of all ages and backgrounds. Participants will gain practical strategies for overcoming challenges, achieving personal and professional goals. This event is organized (6) ______ personal growth, motivate change, and cultivate unity. Join us for an unforgettable experience. Space is limited, so be sure to reserve your spot today!

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.

a. Nonetheless, the fusion of cultures has made the world a more dynamic and open place, where people can celebrate both their unique heritage and the beauty of diversity.

b. Thanks to advancements in technology and communication, people from different countries and backgrounds can now share ideas, traditions, and experiences more easily than ever before.

c. This cultural exchange has led to the blending of various elements such as food, fashion, music, and language, creating a rich, diverse global society.

d. In today’s interconnected world, global culture has become an important aspect of modern life.

e. While this global culture encourages understanding and unity, it also presents challenges, such as the loss of local traditions and the risk of cultural homogenization.

Cho góc α thỏa mãn ${\cos }^2\alpha =\frac{1}{6}$. Khẳng định nào sau đây là đúng?

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

a. Nam: Oh, don't worry! You'll be fine.

b. Minh: Thanks! I hope I can make a good impression.

c. Minh: I've got an interview for a part-time job tomorrow, and I'm feeling really nervous.

Người tiêu thụ những sản phẩm, dịch vụ để thoả mãn nhu cầu của mình nhằm tạo động lực cho sản xuất phát triển được gọi là gì?

Bản kế hoạch thu chi giúp quản lí tiền của cá nhân bao gồm các quyết định về hoạt động tài chính như: thu nhập, chi tiêu, tiết kiệm, đầu tư, để thực hiện những mục tiêu tài chính của cá nhân được gọi là gì?

Một trong những đặc trưng cơ bản nhất của cơ chế thị trường là gì?

Cho tam giác ABC. Gọi I là trung điểm AB. Tìm điểm M thỏa mãn hệ thức \(\overrightarrow{MA}+\overrightarrow{MB}+2\overrightarrow{MC}=\vec{0}\)?

"Sử để ghi việc, mà việc hay hoặc dở đều dùng làm gương răn cho đời sau".

(Ngô Sĩ Liên và các sử thần nhà Lê, Đại Việt sử ký toàn thư, Tập I,

NXB Khoa học xã hội, Hà Nội, 1998, tr.101)

Nhận định trên đề cập đến ý nghĩa nào sau đây của tri thức lịch sử?

Về phía cơ quan nhà nước, các hành vi vi phạm quyền và nghĩa vụ của công dân trong tham gia quản lý nhà nước và xã hội đều gây ra hậu quả như thế nào?

Phát biểu nào đúng trong số phát biểu dưới?

Biểu hiện rõ rệt nhất của vận động theo phương thẳng đứng là gì?

Cho phản ứng hóa học sau: Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g).

Sau 40 giây, nồng độ của dung dịch HCl giảm tử 0,6 M về còn 0,4 M. Tốc độ trung bình của phản ứng theo HCl trong 40 giây là

Read the following leaflet/notice and choose the option that best fits each of the numbered blanks from 7 to 12.

Threats to Wildlife

Wildlife around the world faces numerous threats, (7) __________ of which are caused by human activity. Understanding these dangers is the first step toward protecting the (8) __________ of life on our planet.

- Habitat Destruction: Urban expansion, agriculture, and logging destroy natural habitats, leaving animals without a place to live, breed, and find food.

- Poaching and Illegal Wildlife Trade: Poaching and illegal wildlife trade have (9) __________ species such as elephants, rhinos, and tigers to the verge of extinction.

- Pollution: Pollution from plastics, chemicals, and oil spills has caused serious harm to wildlife, especially when they ingest plastic, get caught in waste, or suffer (10) __________ harmful chemicals in their environment.

- Climate Change: Rising temperatures, extreme weather, and shifting ecosystems due to climate change are disrupting the natural (11) __________. Species that rely on specific climates, such as polar bears and coral reefs, have had their habitats (12) __________ as a result.

Cho \(A = ( - 2;5]\) và \(B = (m; + \infty )\). Tìm \(m \in \mathbb{Z}\) để \(A{\rm{\backslash }}B\) chứa đúng 5 số nguyên?

Đạo hàm của hàm số \(y = \frac{{ - {x^2} - 2x + 5}}{{{x^3} - 1}}\) bằng biểu thức nào dưới đây?

Read the passage carefully. Choose an option (A, B, C, or D) that best answers each question from to 646 to 650:

1. Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.

2. The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.

3. On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't  agree.

4. What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

5. As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

What does the word “they” in paragraph 2 refer to?

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.  

The phrase These organisms in paragraph 1 refers to...