Một con lắc lò xo gồm một vật nhỏ khối lượng m và lò xo có độ cứng k. Con lắc dao động điều hoà cới tần số góc là:

Nguồn thu chủ yếu nhất của ngân sách nhà nước là:

Cho câu thơ sau:

“…nhất trận hỏa công

Tặc binh đại phá, huyết hồng mãn giang”.

Điền vào chỗ trống tên chiến thắng mà quân dân nhà Trần đạt được trong cuộc kháng chiến chống quân Mông – Nguyên.

Cho 4 cung (trên một đường tròn định hướng): \(\alpha =\frac{\pi }{3};\beta =\frac{10\pi }{3}\); \(\gamma =\frac{-5\pi }{3};\delta =\frac{-7\pi }{3}\). Các cung có điểm cuối cùng trùng nhau là?

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.

a. If we continue to put sustainability at the center of our recovery plans, we will have stronger economies that can last for a long time without damaging nature.

b. When businesses use clean energy like solar power, they can save money while they help the environment.

c. Cities that plant more trees and build bike lanes are becoming healthier places where people enjoy living and working.

d. Many countries are planning new ways to grow their economies because the old ways hurt our planet too much.

e. Although some people think green jobs are expensive, studies show that they create more work opportunities than traditional industries.

Văn hóa và văn minh đều 

Tìm tất cả các giá trị thực của tham số m để đồ thị hàm số $y=x^4-2m{x}^2$có 3 điểm cực trị là tạo thành 1 tam giác đều?

Phát biểu nào sau đây là \(\mathbf{S A I}\) về hằng số cân bằng \(K_{C}\) ?

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.

Question 15: 

Hi Gemma,

a. But it was interesting to watch these videos.

b. Thanks so much for the guitar lesson videos you sent me last week.

c. You know, we ought to practise together for some time. What do you think?

d. Thanks also for the tip about the free websites with musical lesson videos - they are much better than the sites I've been following.

e. It's really nice to learn how to play a new instrument like the guitar, but I am too busy at the moment, so I'm focusing on my violin lessons for now.

Write back soon.

Billy

(Adapted from THINK)

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"?

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.

a. Over the past three years, I have been working as a customer service specialist, focusing on building strong relationships with clients.

b. Handling complaints and providing solutions has sharpened my problem-solving skills and taught me how to stay calm under pressure.

c. My ability to communicate effectively with people from diverse backgrounds has been key to my success in this role.

d. Although the job can be demanding at times, I find it rewarding to help customers and contribute to the company’s reputation.

e. Overall, I am grateful for the opportunities this position has given me to grow professionally and personally.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Discount broker TD Waterhouse has stirred up a hornets’ ________ with the announcement that it will introduce margin trading into the UK.

Vì sao nước đi vào mạch gỗ theo con đường gian bào đến nội bì thì chuyển sang con đường tế bào chất?

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.

Extraordinary Rhythms of Life: People Changing the World in 2025

Discover the (1)_________ individuals who are transforming our world today! Our (2)_________ create positive change through small actions every day.

The volunteers (3)_________ tirelessly in remote areas deserve our recognition and support. These inspiring leaders bring hope (4)_________ communities facing difficult challenges.

In 2025, these changemakers are (5)_________ a world of difference in how we live. We invite you (6)_________ our event and learn about these amazing stories of courage.

Contact us today at www.extraordinaryrhythms2025.com!

Nơi nào trong một năm có hai lần Mặt Trời lên thiên đỉnh?

Quyết định nào của hội nghị ban chấp hành Trung ương Đảng cộng sản Đông Dương lần thứ 8 (5 - 1941) được coi là một điển hình sáng tạo trong việc vận dụng chủ nghĩa Mác - Lênin về khởi nghĩa vũ trang vào Việt Nam? 

Phân tử S₈ có 128 electron, hỏi số hiệu nguyên tử của lưu huỳnh (S) là bao nhiêu?

Read the passage carefully

1. Do you find yourself yawning all day at school? You probably need more sleep. However, it is not just how much sleep you get that is important. What you do before bedtime also has a huge effect on how you feel the next day. If you spend time chatting to someone on social media, or reading a book on your e- reader, you are not alone.

2. All devices' screens give out a large amount of blue light, which affects the body's production of the sleep hormone, melatonin, which can change your sleep patterns. So it is not just getting to sleep that becomes hard, but the quality of your sleep also suffers. The result is that you can wake up several times during the night, and have difficulty getting up in the morning.

3. Sleep is food for the brain, so not sleeping well can be a severe problem for anyone, especially for teenagers, because their brains are still developing. When you do not sleep well, it can be difficult to concentrate at school, which makes it harder to learn and get good grades. It can also affect your mood, making you feel sad or anxious. 

4. So, it is clear you should not use your phone before you go to sleep. Why not leave it in another room? Nothing on social media is so important that it cannot wait a few hours! You should rediscover paper books and enjoy feeling tired and sleepy before bedtime rather than wondering why your best friend has not liked your photo! How will you wake up? You do not have to use the alarm on your phone. Go and buy yourself an old-fashioned alarm clock! The negative effects that screen time is having on sleep have been in the news a lot recently, so manufacturers of smartphones and tablets have added a feature to the mobile devices that can help reduce these. Most new phones have a night-time setting that changes the colour of the screen so that it gives out less blue light. If you really cannot avoid going onto social media at bedtime, think about turning on this setting on your phone.

(Adapted from Prepare)

Which of the following can be affected by blue light from digital screens?

"Biết tạo ra sự khác biệt trong ý tưởng kinh doanh, và phân tích được cơ hội và thách thức trong công việc kinh doanh của bản thân". Đó là biểu hiện cho năng lực nào của người kinh doanh?

Cho biết đâu là địa chỉ URL tìm kiếm?