Chọn đáp án đúng. Với \(a,b > 0\) thì?

Khi động cơ chưa làm việc, bộ phận nào cung cấp điện cho các thiết bị tiêu thụ điện trên ô tô?

Mâu thuẫn cơ bản trong xã hội phương Đông cổ đại là mâu thuẫn giữa các giai cấp nào?

Sau đây là một số ý kiến về khả năng của máy tính trong các lĩnh vực.

Một xilanh đang chứa một khối khí, khi đó pít - tông cách đáy xilanh một khoảng 15cm. Hỏi phải đẩy pít – tông theo chiều nào, một đoạn bằng bao nhiêu để áp suất khí trong xilanh tăng gấp 3 lần? Coi nhiệt độ của khí không đổi trong quá trình trên.

Hình tượng Nữ thần Mặt Trời trong sử thi Đăm Săn mang ý nghĩa gì?

Tracy: Do you want to try driving my car, to see how you like it?

Carly: Yeah, sure, ___________.

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

[I] A newborn baby can see, hear and feel. By the age of five, a child can talk, ride a bike and invent imaginary friends. How does this development happen? [II]We don't understand the way language, thinking and planning develop very well. [III]Now scientists are using new technology to ‘see’ into children's brains. And they are discovering new information about the way a baby's brain develops. [IV]

A study in 2010 showed that children who were afforded more focus often gained an edge in IQ. The brain of a newborn infant contains nearly a hundred billion neurons. This number is comparable to that of an adult's brain. As they mature, an infant assimilates information through the sensory modalities of sight, hearing, smell, taste, and touch. This information fosters intricate connections between different regions of the brain. By the age of three, there are approximately a hundred trillion synaptic connections.

One experiment looked at images of babies' brains while they were listening to different sounds. The sounds were in different sequences. For example, one sequence was mu-ba-ba. This is the pattern ‘A-B-B’. Another sequence was mu-ba-ge. This is the pattern ‘A-B-C’. The images showed that the part of the brain responsible for speech was more active during ‘A-B-B’ patterns. This shows that babies can tell the difference between different patterns. This experiment is interesting because sequences of words are important to grammar and meaning. Compare two sentences with the same words in a different order: ‘John killed the bear’ is very different from ‘The bear killed John.’ So babies are starting to learn grammatical rules from the beginning of life.

Researchers also know that babies need to hear a lot of language in order to understand grammar rules. But there is a big difference between listening to television, audiobooks or the internet, and interacting with people. One study compared two groups of nine-month-old American babies. One group watched videos of Mandarin Chinese sounds. In the other group, people spoke the same sounds to the babies. The test results showed that the second group could recognize different sounds, however, the first group learned nothing. The scientist, Patricia Kuhl, said this result was very surprising. It suggests that social experience is essential to successful brain development in babies.

Which of the following best paraphrases the sentence in paragraph 4:

"Social experience is essential to successful brain development in babies."

Nội dung nào sau đây không phản ánh đúng lí do cần thiết phải học lịch sử suốt đời?

Read the following leaflet 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 7 to 12.

MAKE A DIFFERENCE – VOLUNTEER TODAY!

Let’s look at how volunteering can change lives and improve our community.

Facts and Figures:

Did you know that millions of people volunteer every year? Volunteers help in hospitals, schools, animal (7)________, and community centers. They bring people together, improve lives, and support those in need. Studies (8)________ that people who volunteer feel happier and more connected to their (9)________.

Positive Actions!

Find a cause you care about. (10)_________ it’s helping children, protecting the environment, or caring for animals, there are many ways to get involved.

Start small and be consistent. Even a few hours a month can make a big (11)________. Volunteering regularly helps build trust and strong connections with those you help.

 Learn new skills and meet (12)________ people. Volunteering is a great way to gain experience and make friends, all while helping others.

Cho phản ứng: FeO + HNO₃ → Fe(NO₃)₃ + NO + H₂O. Trong phản ứng này có bao nhiêu phân tử HNO₃ đóng vai trò là chất oxi hóa?

GTLN của \(F(x;y) = 5x - 3y\), với đk \(\left\{ \begin{array}{*{35}{l}} x\ge 0 \\ 0\le y\le 5 \\ x+y-2\ge 0 \\ 3x-y\le 6 \\ \end{array} \right.\text{ }\)?

Read the following advertisement and mark the letter A, B, C, and D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6.

FASHION FOR EVERYONE

"Are you tired of wearing the (1)______? Do you want to express your style in a (2) _____ way? Fashion is not just for the runway; it's for everyone! Our new collection features pieces (3) _____  for comfort and style will fulfill your wish. Each item is made from high-quality materials, which ensure you feel great all day. Whether you're looking for casual wear or something  to make impression (4)_____others at a party, we've got you covered. (5)_____our store and meet our team who can help you find the perfect outfit. Join the fashion revolution and start (6) _____ your unique style today!"

Các ý kiến sau đúng hay sai khi nói về văn bản nghị luận về một vấn đề xã hội?

Việc các nhà phân phối hàng hóa mua, trữ hàng và bán lại cho các đại lí hoặc nhà bán lẻ nhằm giúp lưu thông hàng hóa hiệu quả thể hiện đặc điểm của chủ thể nào trong nền kinh tế?

Một vật dao động xung quanh vị trí cân bằng theo phương trình \(x=1,5\text{cos}\left( \frac{t\pi }{4} \right)\); trong đó \(t\) là thời gian được tính bằng giây và quãng đường \(h=\left| x \right|\) được tính bằng mét là khoảng cách theo phương ngang của chất điểm đối với vị trí cân bằng.

Xác định ý đúng: Với sự phát triển và thay đổi của ngành thông tin liên lạc là nhờ sự tiến bộ của ngành nào?

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

Scientists have not produced a miraculous drug which can cure SIDA.