Thả một viên đá từ trên cao xuống đất. Trong giây cuối cùng viên đá rơi được quãng đường 12 m. Lấy g = 9,8 m/s². Độ cao của vị trí thả rơi viên đá là

Gọi S là tập hợp các ước nguyên dương của 1605632. Chọn ngẫu nhiên một số từ S. Xác suất để số được chọn chia hết cho 7 là

*Kết quả làm tròn đến hàng phần trăm.

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.

Biting into a ripe, juicy fruit brings a smile to many people’s faces. But eating that same fruit a week before it is ripe probably wouldn’t be as enjoyable! Unripe fruits are often hard and bitter, but that serves a purpose. The hard exterior of an unripe fruit protects the developing seed inside. After a seed fully develops inside the fruit, the fruit changes color, softens, and gets sweeter to become more attractive to animals and humans. These organisms eat the fruit and spread its seeds, ensuring the plant’s survival and regrowth.

But how does a fruit ripen? The ripening process involves many complex chemical reactions. When a fruit ripens, it goes through a chemical change. A chemical change happens when bonds within molecules break, and the atoms that once formed them regroup into new molecules. Chemical changes are irreversible. Once a fruit ripens, it cannot become unripe again.

One molecule responsible for this chemical change is ethylene. Ethylene (C2H4) is a colorless gas made up of carbon and hydrogen atoms. (I). It is a naturally occurring molecule in the atmosphere. (II). It is also an important plant hormone. (III). Plants release ethylene through the growing tips of roots, flowers, and ripening fruit. (IV). Although ethylene serves other purposes in plants, one of its main purposes is to trigger the chemical reactions that cause fruits to ripen. As the fruit matures, oxygen in the air helps stimulate the production of ethylene. This ethylene production is a signal that begins fruit ripening. For that reason, unripe fruits have low levels of ethylene, while ripe fruits have higher levels of ethylene. Most fruits produce ethylene and respond to ethylene in the atmosphere.

Although fruits require ethylene to ripen, different types of fruits respond to this molecule in two distinct ways: non-climacteric fruits and climacteric fruits. Non-climacteric fruits do not ripen after harvesting. They produce very little ethylene of their own. Climacteric fruits, on the other hand, continue to ripen after they are picked. These fruits produce a large amount of ethylene. Climacteric fruits can also speed up the ripening process of other fruits nearby since they release high levels of ethylene into the air.  

Which of the following best paraphrases the underlined sentence: The ripening process involves many complex chemical reactions.

Để nhập từ bàn phím biến a kiểu nguyên ta viết:

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

They had to bring in an outside specialist to install the computer system, _______?

Muốn nối danh sách gồm các từ thành một xâu ta dùng lệnh nào?

Nhà khoa học A. Nô-ben nói: “Tôi hi vọng rằng nhân loại sẽ rút ra được từ nhưng phát minh khoa học nhiều điều tốt hơn là điều xấu”. Câu nói này mang thông điệp gì đến cho nhân loại.

Con hãy lựa chọn đáp án Đúng hoặc Sai

Quan niệm của người Ấn Độ xưa về người anh hùng và người phụ nữ lý tưởng đã phản ánh cái tôi và nhận thức cũng như văn hóa của họ thời đó, đúng hay sai?

Chọn ý đúng nhất: Theo phương pháp chiếu góc thứ nhất, vật thể đặt trong góc tạo bởi mấy mặt phẳng?

Read the following passage about Reducing Electronic Waste 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 18 to 22.

In today's hyper-connected world, our constant need for the newest electronic devices has led to a growing environmental crisis. Electronic waste, or e-waste, is one of the fastest-growing waste streams globally, with millions of tons discarded annually. A digital detox, (18)_________, can be an effective environmental practice that helps address this issue.

(19)_________, the current e-waste crisis might have been avoided. The devices that we carelessly discard often contain valuable materials that could be recycled and harmful components that contaminate soil and water. Many consumers replace functioning smartphones and laptops simply because newer models are available, not realizing the environmental impact of their decisions. The manufacturing process of new electronics requires significant resources and energy; (20)_________.

Practicing digital detox not only improves mental health but also decreases the demand for new products. (21)_________; however, if consumer demand decreases, production might slow down as well. Individuals who commit to using their devices for longer periods contribute significantly to waste reduction, and they often discover that older models fulfill their needs perfectly well.

The electronic waste problem requires both individual action and systemic change. We can create a world embracing sustainable principles, (22)_________, through our participation in digital detox practices and mindful consumption.

CHỦ ĐỀ 7

(Tham khảo bài văn của chủ đề trong đường link dưới đây ở trang 56)

https://tvsthpt.dlib.vn/app/doc-sach-ebook/d0a01a0e4114

Và trả lời câu hỏi sau:

Cyanide là chất ức chế phức hệ \(IV\) của chuỗi vận chuyến electron trên màng ti thể. Hậu quả của việc ngộ độc cyanide đối với tế bào là

“Ngoài cật có một manh áo vải, nào đợi mang bao tấu, bầu ngòi; trong tay cầm một ngọn tầm vông, chị nài sắm dao tu, nón gõ.

Hỏa mai đánh bằng rơm con cúi, cũng đốt xong nhà dạy đạo kia; gươm đeo dùng bằng lưỡi dao phay, cũng chém rớt đầu quan hai nọ.

Chi nhọc quan quản gióng trống kì trống giục, đạp rào lướt tới, coi giặc cũng như không, nào sợ thằng Tây bắn đạn nhỏ đạn to, xô cửa xông vào, liều mình như chẳng có.

Kẻ đâm ngang, người chém ngược, làm cho mã tà ma ní hồn kinh; bọn hè trước, lũ ó sau, trối kệ tàu sắt tàu đồng súng nổ.”

(Nguyễn Đình Chiểu, Văn tế nghĩa sĩ Cần Giuộc)

Từ "con cúi" có nghĩa là

Đảo nào có diện tích tự nhiên lớn nhất ở Nhật Bản?

Trong quá trình xâm lược thuộc địa, các nước đế quốc đã thiết lập được hệ thống ở khu vực nào?

Nước ảnh hưởng đến quang hợp như thế nào?

Chính sách đối ngoại của Mỹ với các nước Mỹ Latinh trong thập niên 20 của thế kỷ XX là gì?

Read the following passage about home schooling in the UK 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.

Full-time education in the UK is compulsory from the age of five to sixteen, but this doesn’t have to be in a school. Around 50,000 children are educated at home. This is called ‘homeschooling’.

 Parents take their children out of school for different reasons, like illness and the need for special care, or because the distance to the nearest school may be too far. Some children are simply unhappy at school. Whatever the reason, they’re allowed to study at home, although inspectors regularly check how they are getting on.

 Hayley and Jenny haven’t been to school for two years but they haven’t neglected their studies. Their mother worked out strict timetables for them, with hourly lessons for each day. She’s responsible for teaching them Maths, English, History and French. Their father teaches them Science and Geography. They study all the other school subjects online. ‘We have lessons with Dad in the evenings and at weekends,’ explains Hayley.

 The family’s home is in a remote part of Wales. ‘The girls were fine at school but they spent so much time getting to school, they were too tired to learn, says their mother, Julia”. ‘We had a family conference and in the end we decided to try homeschooling. So far, it’s been a big success, but the girls know that if they want to go back to school at any time, we’ll let them. We follow the normal school program of lessons, and they will take all the normal school exams.’

 There are disadvantages too, of course. ‘Social isolation is something I worry about,’ says Julia. They both seem happy and well-adjusted, but they haven’t really got friends who live locally. But in the summer holidays they go away on trips to summer camps, where they have no trouble mixing with people and making friends.’

Which of the following best paraphrases the underlined sentence in paragraph 4?

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Brady, as seen in a trailer that went viral earlier this week, was incredible that the undisclosed team opted to keep its incumbent starter.

Phan Bội Châu thực hiện chủ trương giải phóng dân tộc bằng con đường nào?

Kết quả đúng số chữ số có nghĩa của phép tính sau:

$\left(250-23,1.0,3451\right)+0,1034-4,56$

Đâu là vai trò của kali đối với thực vật?