Điền số liệu còn thiếu (dưới dạng số thập phân) để hoàn thành bài tập sau:

Trong tự nhiên, carbon có hai đồng vị bền là ¹²C và ¹³C, chiếm tỉ lệ số nguyên tử lần lượt là 98,9% và 1,1%.

- Nguyên tử khối trung bình của carbon là amu.

- Số mol carbon có trong 2,4022 gram than chì (giả sử chỉ chứa toàn nguyên tố carbon) là mol.

- Số mol ¹²C có trong lượng than chì trên là mol.

Cho hàm số \(f(x)=x^{2}+4 x+2\).

Biết \(\int_{0}^{3}\left[2 f(x)+3^{-x}\right] d x=a+\frac{c}{d \ln 3}\), trong đó \(\frac{c}{d}\) là phân số tối giản. Tính \(T=a-c-d\)

Read the following leaflet 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 7 to 12.

EMBRACE DIVERSITY

⮚     In a multicultural world, we encounter different cultures every day. While some may be familiar, (7) _________ can offer entirely new perspectives on life and society. To truly appreciate diversity, we must (8) _________ to people from various backgrounds, engaging with them to learn about their traditions, values, and ways of life.

⮚     A major benefit of living in a multicultural society is the (9) _________ of our daily experiences and personal growth. We are constantly learning from each other. By participating in activities organized by various communities, you can help create understanding (10) _________ people of different backgrounds. This will foster unity and collaboration.

⮚     In a multicultural world, (11) _________ plays a key role in ensuring peace and harmony across cultures, fostering mutual respect and shared values. To make the most of this diversity, it is essential to have (12) _________ of respect for others, as understanding and tolerance go hand in hand with progress.

Nguyên tử khối trung bình của vanadium (V) là 50,94. Nguyên tố V có 2 đồng vị, trong đó đồng vị $^{50}_{23}V$ chiếm 0,25%. Số khối của đồng vị còn lại là

Tổ chức nào sau đây không phải là biểu hiện của xu thế toàn cầu hóa?

Choose A, B, C or D to answer the question.

You are in a study group where some classmates are already working on a challenging homework assignment. You haven’t started yet and feel a bit nervous to ask for help, but you want to join them. What can you say to participate in the group homework session?

Cặp số nào sau đây là nghiệm của bpt: \(3(x - 1) + 4(y - 2) < 5x + 3\)?

Chọn những phát biểu đúng về AO.

Read the following passage about managing change 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. 

Growing up in Athens, Greece, Lydia Borsi remembers feeling tested when she tried to deal with mental health issues. Borsi says she had been seeing a therapist for anxiety. But she notes that people in Greece do not openly discuss mental health issues, which also get little attention in general healthcare services. “It was a lot more secretive. And people thought that I was a lot more unique,” Borsi said.

That all changed in 2017 when she moved to the United States to study at the University of Rochester in Rochester, New York. “When I came here, I really liked that people were not afraid to speak up about mental health and say that it’s important,” she said. The university was very supportive of her needs and offered plenty of information. She also became involved with a school group called Active Minds that helps students deal with mental health issues. [A]

Then due to the spread of the novel coronavirus, the University of Rochester had to move all its classes and some of its mental health resources online. Luckily, Borsi was able to connect with a mental health expert outside the school, in the local community. [B]

But as many of her American friends returned home, Borsi was stuck. Greece had succeeded in limiting the spread of the virus within its borders, but flights there from the U.S. are barred until July. Also, the health crisis has put her plans to seek admission to medical school in Britain on hold. [C] And she is not alone.

[D] In April, Active Minds launched a survey of over 2,000 students at U.S. colleges and universities. The study found that over 80 percent of those asked said the coronavirus crisis had negatively affected their mental health. One in five said it has affected them severely.

Laura Horne, chief program officer at Active Minds, says the findings are especially troubling given that the crisis is only going to make it harder for colleges and universities to help these students. “Colleges and universities had to pivot rather quickly to respond to COVID-19 and figure out all facets of university life, including mental health services. Now they have to figure out how to communicate with students,” Horne said.

Frank Chen is a Houston, Texas-based psychiatrist who has worked with college-age young adults. He points out that individuals at that age are in an important stage of their mental development. And college can be a difficult experience for students with or without mental health issues, as they balance work, studies, and personal relationships. Adding a major world event, like the spread of the coronavirus, makes it very difficult to predict what the long-term psychological effects might be. “I don’t think that there’s another event in the history of the people who are alive now that can really measure up to this,” said Chen.

Which of the following would be the best title for this article?

Which of the following best restates each of the given sentences?

Give people your helping hand; you'll get it back when you are in need.

Đâu là cách tạo hình nền trong phân cảnh?

Hành vi nào dưới đây thể hiện rõ vai trò, trách nhiệm của hoạt động sản xuất trong đời sống xã hội?

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.

Dear Kim,

a. If media shows only one type of people, children will not understand our big world.

b. Since we are friends from different countries, we know that sharing stories is important for the future.

c. When we see different faces on TV, we learn about new friends and places.

d. Although I am young, I think TV shows should show people from many countries.

e. Because you work at a TV station, can you make shows with people who look different?

Your friend,

LK

Read the following passage about endangered languages and mark the letter A, B, C or D on your answer street to indicate the best answer to each of the following questions from 23 to 30.

Vietnamese cultural identity is a rich and intricate tapestry that reflects the nation's long and storied history. Rooted in over a thousand years of civilization, Vietnam's cultural identity is a fusion of indigenous traditions and external influences, shaped by its geographical location and historical interactions.

First and foremost, at the heart of Vietnamese culture is a deep reverence for family and comm Unity. Confucian Values emphasizing respect for elders, filial piety, and sOCi6l harmony have played a pivotal role in Shaping Vietnamese society. These values are reflected in the close-knit family structures, hierarchical relationships, and communal rituals that are integral to daily life.

Secondly, Vietnamese cuisine is celebrated worldwide for its exquisite flavors and diversity. With its emphasis on fresh ingredients, fragrant herbs, and balanced flavors, Vietnamese food tells a story of the country's agricultural heritage and regional variations. Iconic dishes like pho, banh mi, and spring rolls have become global favorites, representing the culinary artistry deeply ingrained in Vietnamese culture. Also, Vietnam's artistic expressions are equally captivating. Traditional art forms like water puppetry, silk painting, and folk music continue to thrive alongside contemporary artistic movements. Áo dài, a graceful traditional dress, exemplifies the fusion of elegance and modesty in Vietnamese fashion, symbolizing cultural pride and identity.

Today, in the face of modernization and globalization, Vietnamese cultural identity remains resilient. While adapting to the challenges of the 21st century, the Vietnamese people continue to honor their traditions, celebrate their unique cultural expressions, and pass on their heritage to future generations, ensuring that their cultural identity remains Vibrant and enduring.

The word Their in paragraph 4 refers to _____

Câu nói của Nguyễn Trung Trực “Bao giờ người Tây nhổ hết cỏ nước Nam thì mới hết người Nam đánh Tây” thể hiện điều gì?

Những hormone môn thực vật nào thuộc nhóm kìm hãm sự sinh trưởng?

Tiểu thuyết nổi tiếng “Những người khốn khổ” là tác phẩm của:

Thoát hơi nước ở lá cây chủ yếu bằng con đường nào sau đây?