Điện áp giữa hai đầu của một điện trở R là \(u = {U_0}\cos \omega t,\) cường độ dòng điện chạy qua nó là

Choose the correct answer to complete each of the following sentences.

My boss, __________ is always understanding, gave me a day off as I was tired.

Cho dãy số \(\left( {{u}_{n}} \right)\) biết \({{u}_{n}}=\frac{an+5}{n+2}\). Có bao nhiêu giá trị nguyên của \(a\) nhỏ hơn \(100\) để dãy số \(\left( {{u}_{n}} \right)\) là dãy số tăng.

Chủ thể nào cần phải có trách nhiệm đối với sự phát triển bền vững của xã hội; lựa chọn, tiêu dùng hàng hoá có nguồn gốc, xuất xứ rõ ràng; phê phán hành vi trái pháp luật trong hoạt động kinh tế?

Cánh tản nhiệt bố trí ở:

Trong quá trình thống trị Việt Nam, thực dân Pháp đã dựa vào lực lượng xã hội nào để làm chỗ dựa?

Cho dãy các chất: tinh bột, cellulose, glucose, saccharose. Số chất trong dãy thuộc loại disaccharide là bao nhiêu?

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 Mr.Pips,

a. Please let us know your availability, and we will ensure to accommodate your schedule.

b. If this idea interests you, we would be happy to arrange a meeting and explore further details.

c. I am writing to discuss a potential collaboration between our teams, as I believe our shared expertise could lead to exciting opportunities.

d. Our company has recently launched a new project, and we are confident that your insights would add tremendous value to its success.

e. We have identified several areas where our objectives align, so working together could maximize the impact of our efforts.

Best regards,

Choose A, B, C or D to complete each dialogue.

Nam: Do you want me to help with your homework?

Lan: ______

Cho đoạn chương trình sau:

x=10

y=3

d=0

if x%y==0:

          d=x//y

Sau khi thực hiện đoạn chương trình trên giá trị của d là:

Read the following passage about the urban shift 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. (2,5 points)

            [I] Water is one of the most essential resources on our planet, vital for all forms of life. However, increasing demand and pollution are putting immense pressure on our freshwater supplies. [II] According to recent studies, nearly 2 billion people worldwide live in countries experiencing high water stress, leading to a decline in the availability of this precious resource. This situation not only affects drinking water but also agriculture, sanitation, and energy production.

            The primary causes of water scarcity include population growth, urbanization, and climate change. As cities expand, the demand for water increases significantly. Moreover, agricultural practices that rely heavily on water are becoming unsustainable in many regions. Climate change further exacerbates these issues, causing unpredictable weather patterns and extreme droughts, which reduce water availability.

           [III] In response to this growing crisis, everyone must prioritize water conservation. Simple actions, such as fixing leaks, using water-efficient appliances, and practicing mindful consumption, can make a significant difference. Additionally, implementing policies that promote sustainable water management and investing in technologies for water recycling can help mitigate the impacts of water scarcity. [IV]

            Despite these efforts, the challenges remain substantial. It is crucial that we recognize the importance of conserving water and take immediate steps to protect this vital resource for future generations.

The word “vital” in paragraph 1 could be best replaced by………….

Để quan sát được hình dạng kích thước của tế bào thực vật, cần sử dụng dụng cụ nào sau đây?

Hiện tượng bùng nổ dân số diễn ra ở đâu?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34. Foot-racing is a popular activity in the United States. It is seen not only as a competitive sport but also as a way to exercise, to enjoy the camaraderie of like-minded people, and to donate money to a good cause. Though serious runners may spend months training to compete, other runners and walkers might not train at all. Those not competing to win might run in an effort to beat their own time or simply to enjoy the fun and exercise. People of all ages, from those of less than one year (who may be pushed in strollers) to those in their eighties, enter into this sport. The races are held on city streets, on college campuses, through parks, and in suburban areas, and they are commonly 5 to 10 kilometers in length. The largest footrace in the world is the 12-kilometer Bay to Breakers race that is held in San Francisco every spring. This race begins on the east side of the city near San Francisco Bay and ends on the west side at the Pacific Ocean. There may be 80,000 or more people running in this race through the streets and hills of San Francisco. In the front are the serious runners who compete to win and who might finish in as little as 34 minutes. Behind them are the thousands who take several hours to finish. In the back of the race are those who dress in costumes and come just for fun. One year there was a group of men who dressed like Elvis Presley, and another group consisted of firefighters who were tied together in a long line and who were carrying a fire-hose. There was even a bridal party, in which the bride was dressed in a long white gown and the groom wore a tuxedo. The bride and groom threw flowers to bystanders, and they were actually married at some point along the route.

A “bystander” as used in the last paragraph refers to which of the following?

Thể tích toàn phần:

Chuyển động của vật nào dưới đây có thể coi là chuyển động rơi tự do?

Cho hàm số \(f(x)\) liên tục trên \(\mathbb{R}\) và có đồ thị như hình vẽ. Số nghiệm thực của phương trình \(|f(x)-1|=3\) bằng 

Phong trào Văn hóa Phục hưng (thế kỉ XV - XVII) diễn ra đầu tiên ở quốc gia nào?

Số oxi hoá của nitrogen trong ion NO₃^- là