Nguyên nhân nào sau đây làm suy thoái nhanh đất trồng ở các nước đang phát triển?

Choose the best answer to fill in the blank (17)

Cho sơ đồ phản ứng: Fe + H₂SO_{4 đặc nóng}→ Fe₂(SO₄)₃ + S + H₂O. Sau khi cân bằng với hệ số nguyên tối giản, hệ số của H₂SO₄ trong phản ứng là

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following sentences.

She tried very hard to pass the driving test. She could hardly pass it.

Nhận định nào đúng với lớp Manti dưới?

Vai trò của hoạt động trao đổi với người sản xuất và người tiêu dùng được xem là gì?

Read the following passage about Life in The Future 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 the near future, technology is expected to bring about significant changes to how we lead our lives. One of the most notable shifts will be the way we keep up with the rapid pace of technological advancements. With smart homes and autonomous vehicles, our daily routines will increasingly depend on sophisticated systems designed to make our lives easier. For example, smart assistants will look out for our needs, such as ordering groceries, adjusting room temperatures, or even scheduling doctor’s appointments.

Another major development will be in communication. Today, we already use video calls to stay in touch with friends and family across the globe, but the future promises even more immersive experiences. Virtual reality could allow us to hang out with people in virtual spaces, regardless of where they physically are. As a result, geographical barriers will become less relevant, creating a more connected and global society.

Healthcare is also likely to transform. Advances in artificial intelligence will enable doctors to look after patients more efficiently, diagnosing diseases earlier and prescribing personalized treatments. These changes may extend our lifespan and improve our quality of life. Additionally, breakthroughs in renewable energy will play a key role in sustaining our future. With green energy sources, such as solar and wind power, we can cut down on harmful emissions and move toward a more sustainable planet.

While these advancements sound exciting, they also bring challenges. As technology becomes more integrated into our lives, we must be careful to ensure privacy and security. We need to watch out for potential risks, like data breaches and the misuse of personal information. With thoughtful planning, however, the future holds great promise for improving the way we live, work, and interact with the world.

According to the passage, which of the following statements is TRUE?

Read the passage below and choose A, B, C or D.

Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.

The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.

On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't agree.

What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

Which of the following does the author probably support?

Nội dung nào sau đây thể hiện điểm sáng tạo của Lê - nin khi vận dụng những đặc điểm của nền kinh tế tư bản chủ nghĩa trong quá trình khôi phục kinh tế ở Liên Xô (1921-1925)?

Trận chiến quyết định thắng lợi của cuộc kháng chiến chống quân Xiêm là:

Tổ chức liên kết kinh tế khu vực ở nào có nhiều quốc gia châu Á tham gia nhất?

Nguyên tử của nguyên tố oxygen có 8 electron và 8 neutron. Nguyên tử O có kí hiệu là

Phương án nào sau đây nói đúng nhất về một công cụ cơ bản để số hóa văn bản?

Hình thức chăn nuôi chủ yếu ở khu vực Tây Nam Á là gì?

Những đường sức điện nào vẽ ở dưới đây là đường sức của điện trường đều

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!"

Một ô tô đi trên quãng đường AB với v = 54 km/h. Nếu tăng vận tốc thêm 6 km/h thì ô tô đến B sớm hơn dự định 30 phút. Quãng đường AB là:

Trong tình huống dưới đây, bà V đã thực hiện quyền nào của công dân?

"Bà V (mẹ chị N) được cấp giấy chứng nhận quyền sử dụng đất đối với thửa đất có diện tích 100 m2, nhưng diện tích đất thực tế không đúng 100 m2 như giấy chứng nhận. Bà V muốn gửi đơn đến cơ quan có thẩm quyền, nhưng do bà hiện nay đã già yếu (75 tuổi) và hay ốm đau, chị N được mẹ uỷ quyền cho chị đến cơ quan nhà nước có thẩm quyền để đề nghị họ xem xét lại sự việc".

Khi nói về cấu trúc của protein, phát biểu nào sau đây là sai: