Có bao nhiêu phát biểu sau đây là đúng khi nói về giảm phân?

1) Giai đoạn thực chất làm giảm đi một nửa số lượng NST ở các tế bào con là giảm phân I.

2) Trong giảm phân có 2 lần nhân đôi NST ở hai kì trung gian

3) Giảm phân sinh ra các tế bào con với bộ NST giảm đi một nửa so với tế bào mẹ.

4) Bốn tế bào con được sinh ra đều có n NST giống nhau về cấu trúc.

Rửa xe, đánh bóng vỏ xe là công việc bảo dưỡng cơ bản nào?

Nhiệt độ ngăn mát của tủ lạnh nhà Hùng là 2,5°C. Hùng đặt một quả bóng chườm lạnh có chứa 1365 mg không khí ở 0°C và áp suất 1atm vào trong tủ lạnh. Biết 1 mol không khí có khối lượng 29 g và thể tích 22,4 lít ở nhiệt độ 0°C và áp suất 1 atm. Nếu áp suất khí trong quả bóng không đổi thì khi cân bằng nhiệt, thể tích của quả bóng tăng thêm bao nhiêu mi-li-lít (ml)? Lấy kết quả xấp xỉ đến hai chữ số thập phân.

Cho hình vuông \(\left( {{C}_{1}} \right)\) có cạnh bằng \(a\). Người ta chia mỗi cạnh của hình vuông thành bốn phần bằng nhau và nối các điểm chia một cách thích hợp để có hình vuông \(\left( {{C}_{2}} \right)\).

Từ hình vuông \(\left( {{C}_{2}} \right)\) lại tiếp tục làm như trên ta nhận được dãy các hình vuông \({{C}_{1}}\), \({{C}_{2}}\), \({{C}_{3}}\),..., \({{C}_{n}}\). Gọi \({{S}_{i}}\) là diện tích của hình vuông \({{C}_{i}},\,\left( i\in \left\{ 1;2;3,..... \right\} \right)\). Đặt \(T={{S}_{1}}+{{S}_{2}}+{{S}_{3}}+...+{{S}_{n}}+...\). Biết \(T=\frac{32}{3}\). Tính \(a\)?

Có 6 người sống ở các tầng khác nhau của một tòa nhà 6 tầng: A và B ở căn hộ có 1 phòng ngủ; C, D và E sống ở căn hộ có 2 phòng ngủ; F ở căn hộ có 3 phòng ngủ; căn hộ ở tầng 2 có 2 phòng ngủ; F sống ở tầng thấp hơn D; C sống ở tầng thấp hơn B; căn hộ ở tầng 5 hơn căn hộ ở tầng 3 một phòng ngủ.

Câu nào dưới đây không thể đúng?

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

“Remember to pick me up at 5 o’clock tomorrow afternoon.” she said.

Máy động lực công suất nhỏ phù hợp với cánh đồng có diện tích:

Dựa vào tính chất điều tiết của thuế, hệ thống thuế được phân chia thành mấy loại chính?

Cho \(A = (2; + \infty )\) và \(B = (m; + \infty )\). Điều kiện cần và đủ của m để \(B \subset A\) là?

Đại bộ phận lãnh thổ nước Liên bang Nga nằm trong vành đai khí hậu nào?

Read the following passage about green living 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 23 to 30

          Green living refers to a lifestyle that promotes sustainability and environmental consciousness. This way of life encourages individuals to make choices that reduce their carbon footprint and conserve natural resources. Practices such as recycling, using renewable energy sources, and reducing waste are fundamental aspects of green living. By adopting these practices, individuals can contribute to the preservation of the environment and promote a healthier planet for future generations.

          One significant component of green living is the use of renewable energy sources. Solar, wind, and hydroelectric power are examples of renewable energy that can replace fossil fuels. Using renewable energy reduces greenhouse gas emissions and dependence on non-renewable resources. Additionally, renewable energy sources are often more sustainable and have less impact on the environment.

          Another important aspect of green living is sustainable consumption. This involves choosing products that are environmentally friendly and responsibly sourced. For example, buying locally produced food reduces the carbon footprint associated with transportation. Moreover, opting for products made from recycled materials helps conserve resources and reduce waste.

          Green living also emphasizes the importance of conserving water and energy. Simple actions such as turning off lights when not in use, fixing leaks, and using energy-efficient appliances can significantly reduce energy and water consumption. These practices not only benefit the environment but also save money on utility bills.

          Education and awareness play a crucial role in promoting green living. By educating individuals about the benefits of sustainable practices and how to implement them, communities can foster a culture of environmental responsibility. Awareness campaigns, workshops, and educational programs are effective ways to encourage people to adopt green living practices.

Which of the following is TRUE according to the passage? 

Số oxi hoá của nitrogen trong ion NO₃^- là

Từ nào bị dùng SAI trong câu sau:

“Chị Quỳnh là một người phụ nữ tháo dát, khó khăn nào trong công việc cũng được chị giải quyết một cách nhanh gọn.”

Read the passage below and choose A, B, C or D to answer each question from 641 to 645.

Cities develop as a result of functions that they can perform. Some functions result directly from the ingenuity of the citizenry, but most functions result from the needs of the local area and of the surrounding hinterland (the region that supplies goods to the city and to which the city furnishes services and other goods). Geographers often make a distinction between the situation and the site of a city. Situation refers to the general position in relation to the surrounding region, whereas site involves physical characteristics of the specific location. Situation is normally much more important to the continuing prosperity of a city. If a city is well situated in regard to its hinterland, its development is continuing prosperity of a city. If a city is well situated in regard to its hinterland, its development is much more likely to continue. Chicago, for example, possesses an almost unparalleled situation: it is located at the southern end of a huge lake that forces east-west transportation lines to be compressed into its vicinity, and at a meeting of significant land and water transport routes. It also overlooks what is one of the world’s finest large farming regions. These factors ensured that Chicago would become a great city regardless of the disadvantageous characteristics of the available site, such as being prone to flooding during thunderstorm activity.

Similarly, it can be argued that much of New York City’s importance stems from its early and continuing advantage of situation. Philadelphia and Boston both originated at about the same time as New York and shared New York’s location at the western end of one of the world’s most important oceanic trade routes, but only New York possesses an easy-access functional connection (the Hudson- Mohawk Lowland) to the vast Midwestern Hinterland. This account does not alone explain New York’s primacy, but it does include several important factors. Among the many aspects of situation that help to explain why some cities grow and others do not, original location on a navigable waterway seems particularly applicable. Of course, such characteristics as slope, drainage, power resources, river crossings, coastal shapes, and other physical characteristics help to determine city location, but such factors are normally more significant in early stages of city development than later.

What is the topic of the passage?

Read the following passage 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 23 to 30.

Vietnamese Women’s Achievements

Women have always played an important role in Vietnam’s history. Some fight for their country, some inspire others, and some make positive changes to society. Their contributions have shaped the nation in various ways, leaving a lasting impact on culture, politics, and the arts.

Trưng Trắc and Trưng Nhị are famous examples of women who fought for their country’s freedom. Known in Vietnamese as “Hai Bà Trưng,” the Trưng sisters successfully led their people in a rebellion against foreign invaders in 40 A.D. After their victory, they ruled the country for three years, demonstrating remarkable leadership and bravery. As the first female rulers of Vietnam, the Trưng sisters have become symbols of patriotism and resilience. Their significance is even greater considering that Vietnamese women at the time had very limited access to education and politics. Their story continues to inspire generations.

Sương Nguyệt Anh is another example of an influential Vietnamese woman. As the daughter of the patriotic poet Nguyễn Đình Chiểu, she mastered literature from a young age. She worked as a teacher before becoming the editor-in-chief of Nữ Giới Chung, the first women’s newspaper in Sài Gòn, in 1918. As the first female editor in Vietnam, she made significant contributions to the press, feminism, and poetry. Through her work, she promoted women’s rights and encouraged female empowerment.

A third example is Điềm Phùng Thị. She graduated from Hà Nội Medical University in 1946 and earned a PhD in dentistry in France in 1954. However, she later pursued a career in sculpture, creating artworks that reflected her love for Vietnam. She exhibited her work throughout Europe and became the first female Vietnamese member of the European Academy of Arts and Sciences in 1992. Her name was later recorded in the Larousse Dictionary of Painters, recognizing her as a remarkable artist.

The word their in paragraph 2 refers to:

In Part Three of the Speaking Section you work together with a partner. You have to do a single task which usually lasts about 3 minutes. One possible task is “problem solving”, which means you have to look at some visual information and then discuss the problem with your partner. You may be shown photos, drawings, diagrams, maps, plans, advertisements or computer graphics and it  is essential that everyone (631)___________ them carefully. If necessary, check you know exactly (632) ________________ the examiner to repeat the (633) __________ or make them clearer.

While you are doing the task, the examiner will probably say very little and you should ask your partner questions and (634)  ___________ suggestions if he or she is not saying much. If either of you have any real difficulties, the examiner may decide to step in and help. Normally, however, you find plenty to say, which helps the assessor to give you a fair mark. (635) ____________in doing the task by competing with your partner, which includes taking turns in giving opinions and replying appropriately, although in the end it may be possible to “agree to disagree”.

Câu 633:

Khi tăng diện tích đối diện giữa hai bản tụ lên bốn lần và khoảng cách giữa hai bản tụ cũng tăng hai lần thì điện dung của tụ điện phẳng sẽ

Nguyên nhân chủ yếu nào sau đây làm suy giảm tài nguyên đất ở nước ta hiện nay?

Một trong những di sản văn hóa phi vật thể tiêu biểu của Việt Nam là:

Cho tập hợp $A = [ 4;7]$ và $B = [ 2a + 3b -1;3a - b + 5]$ với $a$, $b \in \mathbb{R}$. Khi $A = B$ thì giá trị biểu thức $M = a^2 + b^2$ bằng