Tìm các giá trị của tham số \(m\) để phương trình \({{x}^{2}}-mx+4m=0\) vô nghiệm.

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.

What does Frank Chen mean when he says, ‘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’?

Đâu là ngôn ngữ CSDL được sử dụng phổ biến hiện nay?

Cuối thế kỉ XIX, quốc gia Đông Nam Á không bị chủ nghĩa thực dân xâm lược là:

Viện kiểm sát nhân dân gồm có mấy chức năng chính?

Trong máy phát điện xoay chiều có stato là nam châm đặt cố định, rôto là khung dây quay quanh một trục trong từ trường tạo bởi stato thì bộ phận giúp dẫn điện ra ngoài là

Ở khu vực Mỹ Latinh có thuận lợi nào để phát triển cây lương thực và thực phẩm?

Chủ tịch nước có vị trí như thế nào trong bộ máy nhà nước Việt Nam?

Diện tích toàn phần của một hình lập phương bằng $294c{m}^2$. Tính thể tích khối lập phương đó?

Nguyên tử của nguyên tố X có cấu hình electron đã xây dựng đến phân lớp 3d². Tổng số electron của nguyên tử nguyên tố X là

Choose A, B, C or D that has the CLOSEST meaning to the given pair of sentences in each question.

I can cook dinner myself or order food from a restaurant. I prefer the first option.

Hệ thống lái bên phải được phân loại căn cứ vào:

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of stress in each of the following questions: common, profit, attract, travel

Mục tiêu đấu tranh của giai cấp tư sản dân tộc ở các nước Đông Nam Á giữa hai cuộc chiến tranh thế giới (1918 –1939) là

Sau Chiến tranh thế giới thứ hai, phong trào giải phóng dân tộc ở châu Phi diễn ra sớm nhất tại khu vực nào? 

Hình ảnh sau đây là giá thể gì?

Đạo hàm của hàm số y = cos⁶x  + sin⁴x. cos²x + sin²x. cos⁴x + sin⁴x – sin²x bằng biểu thức nào sau đây?

Trong không gian Oxyz, hình chiếu vuông góc của điểm \(A(3;4;-5)\) trên trục Oy là điểm nào dưới đây?

Nguồn lực tài nguyên thiên nhiên được coi là nhân tố như thế nào?

Read of 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.

Beyond Success: The Human Stories Behind Great Achievements

The Journey Behind Every Triumph

While some people focus only on achievements, (7)_________ understand that the path to success is filled with challenges and growth opportunities.

Great innovators often (8)_________ their mentors who guided them through difficult times. The resilience shown by successful people becomes their greatest strength in times of adversity. (9)_________ numerous failures, many accomplished individuals persevered until they reached their goals. Their determination and perseverance serve as (10)_________ for aspiring achievers worldwide. A (11)_________ of successful people attribute their achievements to the support of their families and friends.

Behind Every Success Story

Success is never just about the final achievement. It's about the human journey—the struggles, doubts, failures, and moments of (12)_________ that shape not just careers but character. Join us as we explore the personal stories behind some of the most remarkable achievements of our time.

Khi đun nóng các enzim trên một nhiệt độ nhất định, chúng trải qua quá trình nào?