Mỗi ngày, bạn Chi đều đi bộ để rèn luyện sức khoẻ. Quãng đường đi bộ mỗi ngày (đơn vị: km) của bạn Chi được thống kê lại ở bảng sau:

Quãng đường trung bình mà bạn Chi chạy được là?

Đâu là hình thức sinh trưởng ở cây hai lá mầm?

Trong không gian với hệ toạ độ \(Oxyz\), cho hình lập phương \(ABCD.{A}'{B}'{C}'{D}'\) có đỉnh \(A\) trùng với gốc toạ độ \(O\), điểm \(B\left( 1;0;0 \right)\), \(D\left( 0;1;0 \right)\), \({D}'\left( 0;1;-1 \right)\). Toạ độ vectơ \(\overrightarrow{C{A}'}\) tương ứng là:

Sóng dừng là

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.

According to the passage, how has coronavirus crisis affected 20 percent of college students?

Phát biểu nào là sai khi nói về dao động cưỡng bức?

a. Ethan: We should all try to be more mindful of our actions.

b. Ethan: And that's what makes the planet hotter and hotter over time.

c. Ethan: Do you know what the greenhouse effect is and what it does?

d. Ravi: It's when gases in the air trap heat around the Earth.

e. Ravi: We can reduce our carbon footprint to help slow it down.

Find the mistake: When I walk past the park, I saw some children play football.

Câu nào sau đây không đúng?

Circle A, B, C, or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions. 

Bản kế hoạch về thu chi ngân sách nhằm thực hiện 1 mục tiêu tài chính trong một thời gian ngắn (dưới 3 tháng) thuộc loại tài chính cá nhân nào?

Trong tình huống dưới đây, chủ thể nào đã có hành vi vi phạm quy định pháp luật về quyền khiếu nại của công dân?

"Tại trụ sở tiếp dân của cơ quan thanh tra tỉnh G, có khoảng hơn 50 công dân xã X do ông V đứng đầu đã tụ tập khiếu nại về việc đền bù, giải phóng mặt bằng trong một dự án thực hiện tại xã X, vì họ cho rằng các cơ quan nhà nước không thực hiện đúng chính sách, pháp luật của Nhà nước. Sau khi nghe ông T (cán bộ thanh tra tiếp dân) giải thích chế độ chính sách, các quy định của pháp luật về vấn đề họ khiếu nại, không đồng ý với giải thích đó, hơn 50 người thậm chí đã có xô xát với cán bộ tiếp dân, gây mất ổn định trật tự trên địa bàn".

Từ thông qua một diện tích S không phụ thuộc vào

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 thefollowing questions from 13 to 17.

a. Cơm tấm, a common choice for breakfast, is a rice dish served with pork ribs, fried egg and fish sauce.

b. In other words, the two specialties are popular enough to become the local pride for generations.

c. There are lots of delicious dishes in Ho Chi Minh City that fascinate lots of foreign tourists.

d. In addition, bánh mì is a unique kind of sandwich served with different ingredients like pork or fish.

e. Tourists can try the two specialties in many places in Ho Chi Minh City.

Dựa theo cấu hình electron, các nguyên tố hóa học được phân loại thành

Hệ quả nào dưới đây không phải là của khu vực hóa kinh tế?