chọn đúng hoặc sai với mỗi ý a), b), c), d)

Hình bên biểu diễn một thanh dẫn điện MN trượt trên hai thanh kim loại theo chiều vuông góc với cảm ứng từ. Biết \(B = 0,40\;{\rm{T}},{\rm{MN}} = {\rm{PQ}} = 0,20\;{\rm{m}}.\) Thanh MN đang chuyển động về bên trái với vận tốc có độ lớn \(0,2\;{\rm{m}}/{\rm{s}}\) và có hướng vuông góc với nó. Toàn bộ mạch có điện trở \(2,0\Omega .\) Các thanh kim loại không nhiễm từ, bỏ qua ma sát.

Nội dung nào sau đây thể hiện điểm sáng tạo của Lê - nin khi vận dụng những đặc điểm của nền kinh tế tư bản chủ nghĩa trong quá trình khôi phục kinh tế ở Liên Xô (1921-1925)?

Cho ba nguyên tử có kí hiệu là \({}_{12}^{24}Mg,{}_{12}^{25}Mg,{}_{12}^{26}Mg\). Phát biểu nào sau đây là sai?

Phát biểu nào sau đây không chính xác về môi trường sống của con người?

Khi nhận ra sai sót trong việc nhập dữ liệu cho khóa ngoài ta sửa chữa bằng cách nào sau đây?

Sự phát triển của quần thể vi sinh vật trong môi trường nuôi cấy liên tục không bao gồm pha nào?

Các yếu tố cấu thành thị trường gồm những thành phần nào?

Tập $A=\left\{ 1;2;3;4;5;6 \right\}$ có bao nhiêu tập hợp con có đúng hai phần tử?

Nội dung nào sau đây thể hiện vai trò của nhân sách nhà nước?

Đâu là cây trồng quan trọng hàng đầu ở Cộng hòa Nam Phi?

Read the passage and mark the letter A, B, C or D to answer the following questions.
Volunteering offers many of the same social benefits, with the added bonus of helping others and developing useful skills to put on your CV. Plus, students are in a unique position to help, suggests Tom Fox. "They can take their enthusiasm and excitement for opportunities and share their passions, subject knowledge and experience with people." The idea of giving up time for nothing might seem impractical at first, especially once the pressures of study and coursework or exams begin to mount up. However, Michelle Wright, CEO of charity support organization Cause4, suggests seeing volunteering as a two-way street. "I think it is fine for undergraduates to approach volunteering as a symbiotic relationship where doing good is just one part of the motivation for reaching personal and professional goals."
Katerina Rudiger, head of skills and policy campaigns at the Chartered Institute of Personnel and Development (CIPD), says: "Volunteering can be a valuable way of gaining that experience, as well as building confidence, broadening your horizons, becoming a better team player and developing those all- important 'employability skills' such as communication and decision making." Amanda Haig, graduate HR manager, agrees that volunteering can help your employment prospects. "Volunteering can demonstrate positive personality traits and skill sets, such as proactivity, and teamwork," she says.
A positive side-effect of volunteering is improving your time at university by getting involved in the local community. Leaving the student bubble can make your time as an undergraduate much more varied. At Bath Spa University, more than 1,000 students volunteered over the past year, doing everything from working on local environmental projects to helping in schools or assisting the elderly. ”Quite often there can be a divide between students and permanent residents," says students' union president Amy Dawson, "but if students invest a little time now, they will be giving something back to the local community and will reap the benefits in the future."
“You might also find that volunteering helps your studies if you choose the right program. At Lancaster, volunteering is linked into academic modules in some cases", explains Fox. "This has multiple wins. Students get to apply their learning in the classroom and share their interests with children in local schools or community organizations, while schools gain skilled students with a passion for a subject that enthuses their pupils."

What does the word "they" refer to in paragraph 3?

Phương án nào sau đây chỉ ra vai trò của mạch tích hợp trong kĩ thuật điện tử?

Cho hình hộp đứng ABCD.A'B'C'D’ . Xét tất cả các hình bình hành có đỉnh là đỉnh của hình hộp đó. Hỏi có bao nhiêu hình bình hành mà mặt phẳng chứa nó vuông góc với mặt phẳng đáy (ABCD) ?

"Nếu không giải quyết được vấn đề dân tộc giải phóng, không đòi được độc lập lự do cho toàn thể dân tộc thì chẳng những quốc gia dân tộc còn chịu mãi kiếp ngựa trâu mà quyền lợi của bộ phận giai cấp đến vạn năm cũng không đòi lại được."

Nội dung trên được trích trong văn kiện của Hội nghị nào? 

Chọn đáp án đúng 

Ở người, bộ nhiễm sắc thể lưỡng bội là 2n = 46. Theo lý thuyết, số lượng nhiễm sắc thể có trong mỗi tế bào ở kì cuối của quá trình nguyên phân là bao nhiêu?

Điều nào sau đây gây nên tình trạng nồng độ glucose máu trong cơ thể tăng cao?

Read the following passage about food addiction 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.

Few people would disagree that one of the world's most popular dishes is pizza. Twenty-two-year-old Zack certainly wouldn't. He would eat a variety of pizza-based items, including homemade pizza, precooked microwave pizza, and even pizza leftovers from the night before. He was consuming 800kg of pizza a year. As a child, Zack had eaten a wide variety of food. But he became addicted to pizza when he started secondary school. American school meals have often been criticised for the large amount of fast food present on the menu, and pizza is the star dish. Zack even spent all his pocket money on slices of pizza.

Naturally, Zack's family worried about his high-calorie, low-vitamin diet. So did Zack. In an attempt to break his addiction, Zack agreed to appear on a TV programme called Freaky Eaters. Its aim was to encourage food addicts to beat their addictions with the help of a psychologist and nutritionist. It wasn't easy. He had to eat a fish dish, while his brother sat in front of him enjoying... a pizza! However, Zack met the challenge and has never eaten pizza again.

Seventeen-year-old Stacy Irvine's friends visit her and discover that she has been rewarded thousands of free toys from fast food restaurants as a regular customer. Stacy's mother often gave her two-year-old girl a portion of fried chicken in a McDonald's restaurant. [I] Since then, Stacy has refused to eat anything else except for pieces of fried chicken, and as a result, her diet has created serious health. She has been warned that if she doesn't change her diet, she will die. [II] Stacy once collapsed due to lack of vitamins and nutrients and needed to be hospitalised. [III] She insisted that Stacy adopt a healthier lifestyle. However, worryingly, Stacy's mother said that while Stacy was beginning to understand the seriousness of her situation, she couldn't eat anything else but chicken nuggets. [IV]

Twenty-year-old Hanna Little was keen on chips. The only thing that Hanna consumed for fifteen years was one plate of chips after another. Not surprisingly, a diet that contained few nutrients and an excess of fat and carbohydrates could only have negative consequences. And it did because not only did Hanna develop health problems, but she also had to leave her job after collapsing at work. At five, Hanna became addicted to chips and refused to eat fruits and vegetables despite her mother's efforts. Hanna says that she was terrified of tasting the flavour of different types of food and she would feel anxious just at the idea of doing it. Parties, picnics and barbecues with friends and family used to be a nightmare. Furthermore, Hanna was soon seen as 'odd' by her friends' parents.

It wasn't until the age of sixteen that Hanna realised she had Selective Eating Disorder (SED). Despite this new knowledge, no solution was found. It wasn't until she lost her job before she started eating normally. Hanna sought therapy from psychologist Felix Economakis, who used hypnosis, a treatment that none of the doctors that she had seen before had mentioned, to get her to eat fruit after one one-hour session, and since then she has been willing to eat anything.... including chips!

(Adapted from Friends Global)

Which of the following best paraphrases the underlined sentence in paragraph 4?

Find the word which has a different sound in the part underlined

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.

Hi Alex,

a. Thanks to your guidance, I feel much more confident about presenting the project now, and I’m really proud of what we were able to accomplish together.

b. I really hope we’ll have the opportunity to collaborate again on another project in the near future, as I found working with you to be both inspiring and highly productive.

c. Please let me know if you have availability for any upcoming collaborations—I would be delighted to work with you again.

d. I wanted to take a moment to sincerely thank you for all the invaluable help and support you provided with the project last week.

e. Your thoughtful suggestions and detailed feedback truly made a significant difference, and I believe they played a key role in improving the overall quality and success of the final outcome.

Best,

Catherine