Cho A = {1; 2; 3}. Trong các khẳng định sau, khẳng định nào sai?

Mệnh đề nào sau đây sai?

Điều nào sai khi nói về các đặc điểm của virus?

Từ thế kỉ X đến thế kỉ XV, hệ tư tưởng nào được tiếp nhận và nâng cao thành hệ tư tưởng thống trị trong xã hội phong kiến Việt Nam?

Cho tam giác \(ABC\) có trọng tâm \(G\), gọi \(M\) là trung điểm \(BC\). Phân tích vectơ \(\overrightarrow{AG}\) theo hai vectơ là hai cạnh của tam giác. Khẳng định nào sau đây đúng?

Trong hộp thoại Script-Fu: Blend, ô Max. Blur radius có giá trị 5 có ý nghĩa gì?

Ở nước ta, quyền lực nhà nước thuộc về ai?

Hoạt động trao đổi có vai trò gì?

"Điều tiết thu nhập nhằm thực hiện công bằng an sinh xã hội". Đây là nội dung thuộc tính nào của thuế?

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 631:

Ý tưởng kinh doanh là bao gồm suy nghĩ và hành động như thế nào?

Cho a và b là hai số thực dương thỏa mãn $3{\log }_{2}a={\log }_4\left(a^{2}b\right)$. Mệnh đề nào dưới đây đúng? 

Read the following passage about endangered languages and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questionsfrom 31 to 40.

[I] Social media has become a dominant force in modern communication, offering a range of benefits and challenges. [II] It has revolutionized the way people interact, share information, and even form relationships. [III] While these platforms offer opportunities for connection and expression, they also have their drawbacks. [IV] For instance, excessive use of social media has been linked to a range of negative effects, including mental health issues, social isolation, and decreased productivity. [V] However, when used responsibly, social media can also offer a variety of positive outcomes, such as the ability to stay connected with loved ones, network professionally, and access valuable information and resources.

One of the major benefits of social media is its ability to keep people connected. For example, individuals who live far apart can maintain close relationships through regular communication on these platforms. Social media also facilitates professional networking, allowing users to connect with potential employers or clients, and enabling companies to promote their products and services to a global audience. Additionally, platforms like Facebook, Twitter, and Instagram provide a space for people to share ideas, opinions, and creative work, fostering a sense of community and collaboration.

Despite these advantages, there are serious concerns about the negative impact of social media, particularly on mental health. Studies have shown that excessive social media use can contribute to feelings of anxiety, depression, and loneliness. This is often attributed to the unrealistic portrayals of life that are commonly shared on these platforms, leading to comparisons that can make individuals feel inadequate or left out. Furthermore, constant exposure to negative news or online bullying can exacerbate these feelings and contribute to long-term psychological stress.

Another issue with social media is its potential to distract people from their daily responsibilities. With notifications constantly popping up and endless streams of content to scroll through, individuals may find it difficult to focus on tasks such as work, school, or personal obligations. This can result in decreased productivity and a lack of attention to important matters.

Ultimately, the impact of social media depends on how it is used. If individuals are mindful of their usage patterns and take steps to limit their time on these platforms, they can enjoy the benefits of staying connected and informed without the negative consequences. Parents, educators, and mental health professionals can also play a role in helping young people develop healthy habits and manage their social media use effectively.

Where in paragraph 1 does the following sentence best fit?

"Social media has transformed how individuals communicate and engage with each other."

Phương án nào sau đây thể hiện rõ nhất ứng dụng của hệ nhị phân trong tin học?

Một đội văn nghệ có 4 học sinh nam và 5 học sinh nữ. Giao viên phụ trách muốn chọn ra một đội tốp ca gồm 3 học sinh sao cho có cả nam và nữ cùng tham gia. Giáo viên có bao nhiêu cách chọn đội tốp ca như vậy?

Người làm nghề sản xuất thiết bị điện tử thực hiện hoạt động nào sau đây để đảm bảo chất lượng sản phẩm?

Để thực hiện quản lí chi tiêu cá nhân và tiết kiệm hiệu quả, em cần làm gì?

Read the following passage about the Koromi trend 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.

[I]. If you’ve done any traveling at all, you’re likely quite aware that customs and etiquette differ from one culture to another: what may be perfectly innocuous in one place may be hideously offensive in another, and vice-versa. [II]. Granted, even if you haven’t traveled at all, you’re probably aware of the fact that certain types of behavior aren’t exactly acceptable in other countries: belching at the table may be a sign of gratitude in some places, but in most areas of North America and Europe, such a display will earn you a fair bit of ire. [III]. Whether you plan on traveling to any of the places listed below or just doing business with a foreign client, it’s important to educate yourself on the standards of politesse and etiquette beforehand-the last thing you want to do is offend someone with any ignorant, boorish behavior. [IV]. Here’s how to be polite in different countries.

When dealing with Japanese clients, be sure to dress fairly conservatively, and make sure that you bow lower than they do upon meeting them. Accept gifts with both hands and open them later, not in front of the giver, and never blow your nose at the dining table. Avoid asking and answering direct questions: it’s better to imply rather than ask, and to answer with vagueness during conversations.

In Kenya, when greeting someone older or of a higher status than yourself, grip their right wrist with your left hand while shaking it; it’s a sign of respect and deference. Do ask questions about their health, family, business etc. before getting to major topics, as skipping these niceties is seen as impolite. If sharing meals, do not begin eating until the eldest male has been served and starts to eat.

Turning down an alcoholic drink is considered terribly offensive in Russia, so it’s a good idea to fortify yourself with some greasy food before heading out for a meal with Russian or Ukrainian clients. Don’t smile at strangers or they’ll think you’re deranged, and when paying for items, place your money on the counter rather than trying to hand it directly to the cashier.

Which of the following best summarizes the passage?

Sức căng của dây đàn guitar có thể được điều chỉnh bằng cách vặn khóa dây đàn. Việc chỉnh sức căng của dây đàn làm thay đổi tốc độ truyền sóng trên dây. Xét một dây đàn dài 64 cm khi được gảy phát ra âm cơ bản có tần số 275 Hz, quan sát thấy trên dây đàn thấy chỉ có hai điểm cố định. Nhạc công vặn khóa dây đàn để tốc độ truyền sóng trên dây tăng thêm 70,4 m/s, khi đó dây đàn phát ra âm cơ bản có tần số \(f_0\). Giá trị của \(f_0\) bằng bao nhiêu?

Cho 2 điện tích điểm nằm ở 2 điểm A và B và có cùng độ lớn, cùng dấu. Điểm có điện trường tổng hợp bằng 0 là

Cho cấp số cộng \(\left(\mathrm{u}_{\mathrm{n}}\right)\) biết : \(\left\{\begin{array}{l}u_{1}+u_{5}=6 \\ u_{10}-u_{2}=8\end{array}\right.\).

Ta có công sai của cấp số cộng \(\left(u_{n}\right)\) là: