Hai hạt có khối lượng lần lượt là m₁, m₂ với m₂ = 4m₁ và có điện tích là q₁ = - 0,5q₂. Biết hai hạt bay vào vuông góc với các đường sức từ của một từ trường đều B với cùng một vận tốc và bán kính quỹ đạo của hạt 1 là R₁ = 4,5 cm. Bán kính quỹ đạo của hạt thứ 2 là bao nhiêu cm?

Điền vào chỗ trống.

Cho bảng số liệu:

LƯỢNG MƯA CÁC THÁNG NĂM 2021 TẠI TRẠM ĐÀ NẴNG

(Đơn vị: mm)

(Nguồn: Niên giám thống kê Việt Nam, 2021)

Căn cứ vào bảng số liệu trên, tính lượng mưa trung bình của Đà Nẵng năm 2021.

(Làm tròn đến chữ số hàng đơn vị của mm)

Đáp án: ............

Cổng logic có thể được tạo ra từ mạch logic sau là

The word ‘they’ in paragraph 2 refers to ______.

Read the following passage about Building Understanding Across Nations 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.

In our interconnected world, cultural ambassadors play a vital role in bridging the gaps between different nations and peoples. These dedicated individuals and groups serve as links between cultures, fostering mutual understanding and respect through various activities and programs. Their mission is to showcase their own cultural heritage while learning about and appreciating others, creating pathways for meaningful dialogue and lasting connections across borders.

Cultural ambassadors employ numerous methods to achieve their goals. They organize traditional festivals and art exhibitions that display unique customs, allowing visitors to experience different cultures firsthand. Language exchange programs enable people to communicate more effectively, while cultural workshops teach traditional crafts, music, and dance. These ambassadors also utilize digital platforms to reach wider audiences, sharing stories and traditions through social media and online events that connect people from different corners of the world.

Despite their important work, cultural ambassadors face several challenges in their mission. Stereotypes and prejudices can create barriers to understanding, while language differences sometimes lead to misunderstandings. Limited resources and funding may restrict their activities, and political tensions between nations can complicate their efforts. However, these dedicated individuals persist in their work, believing that personal connections and shared experiences can overcome these obstacles and promote harmony among different communities.

Looking ahead, the role of cultural ambassadors becomes increasingly significant in our global society. Their efforts to build bridges between nations contribute to reducing conflicts and fostering peace. Through their continued dedication to promoting cross-cultural understanding, these ambassadors help create a more inclusive and connected world where differences are celebrated rather than feared. This ongoing process of cultural exchange remains essential for building a future based on mutual respect and cooperation.

The word “their” in paragraph 2 refers to _________.

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 31 to 40.

Who are you?

On 6 June 2011, the media reported the kidnapping of a female Syrian-American blogger called Amina Arraf. Regarded as a daring political rebel, the 35-year-old had gained popularity for her blogs protesting the lack of freedom in Syria. Yet, only two days later, it was discovered that Amina had never existed. She was a fictional character created by Tom MacMaster, a forty-year-old American PhD student at the University of Edinburgh.

MacMaster's invention is an example of sock puppetry: the use of false identities to deceive others. (I). The false identity is known as a sock puppet, and its creator, a puppet master. (II). MacMaster created Amina to express his views on Middle Eastern affairs without offending other Americans. (III). Writing as Amina gave him the authority to say what he wanted. (IV).  

At the turn of the millennium, Debbie Swenson created Kaycee Nicole, a fictional teenage girl suffering from terminal cancer. Her blog, Living Colours, described Kaycee’s struggle, attracting millions of readers. When Kaycee 'died' on 14 May 2001, her fans were devastated. Their distress turned to anger when they discovered that Kaycee was not real. Swenson had developed the character to gain attention and sympathy.

While Amina and Kaycee were used to meet their creators' needs, other identities have been invented for profit. American gun advocate John Lott made up a fake student, Mary Rosh, to defend his writing online and give him positive reviews. Mystery writer RJ Ellory fabricated a team of sock puppets to praise his own books and tear into those of his rivals. British historian Orlando Figes lost credibility when he had to publicly apologise for doing the same.

Yet none of these stories compare to large-scale sock puppetry today. The New York City Police Department has false identities on social media to catch criminals. The US military is believed to use sock puppets to track potential terrorists. It is clear that the internet is a minefield today and we all have to step very carefully in order not to get hurt.

Which of the following is OPPOSITE in meaning to "fictional"?

Số lượng sản phẩm của công ty bán được trong $x$ (tháng) được tính bởi công thức $S(x)=300\Big(2+\dfrac{4}{x+2} \Big)$ với $x\ge 1$. Xem $y=S(x)$ là một hàm số xác định trên $\left[ 1;+\infty \right)$, khi đó tiệm cận ngang của đồ thị hàm số đó là

Một vật dao động điều hòa dọc theo trục Ox với biên độ 20mm, tần số 2Hz. Tại thời điểm \(t = 0s\) vật đi qua vị trí có li độ 1cm theo chiều âm. Phương trình dao động của vật là:

Nhiều quốc gia trên thế giới áp dụng biện pháp đánh thuế suất cao đối với một số hàng hoá, dịch vụ đặc biệt, nhằm điều tiết việc sản xuất và tiêu dùng xã hội cũng như nhập khẩu hàng hóa, từ đó tăng nguồn thu cho ngân sách nhà nước là thực hiện loại thuế nào sau đây?

Cho hàm số \(f\left( x \right)=\frac{-2x+3}{x-2}\).

Read the following advertisement 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 1 to 6.

During the 1960s and '70s, industrialised countries suffered a(n) ______(1), and violent crimes such as muggings increased at an alarming rate. What is more, it was expected to ______(2) worse. Only it didn't. Instead, it got much, much better. In the 1990s, crime started to fall dramatically, and today it is down by almost 50% across the industrialised world and continues to fall. Triumphant politicians will assert that their policies have cut crime. Actually______(3) of the country's policies, the trend does coincide ______(4) the use and subsequent prohibition of tetraethyl lead in petrol, ______(5) for years as a cause of aggressive behaviour. Therefore, countries that still use leaded petrol are being urged to stop ______(6) it to help improve health and crime prevention.

UNIX là hệ điều hành có đặc điểm gì?

Chế phẩm nấm trừ sâu hiệu quả với:

Nhận xét nào sau đây là đúng?