Một vật rơi tự do từ độ cao h xuống đất. Công thức tính vận tốc của vật khi chạm đất là

Quá trình trao đổi chất là quá trình như thế nào?

Kết quả trên màn hình của đoạn chương trình sau là bao nhiêu?

a=b=1

c=1

d=2

print(a+b+c+d)

Nền kinh tế nước ta có bao nhiêu hoạt động kinh tế chủ yếu trong đời sống xã hội?

Cừu Đôly là động vật có vú đầu tiên được nhân bản vô tính trên thế giới được tạo ra từ tế bào sinh dưỡng trưởng thành, nhờ áp dụng phương pháp chuyển nhân. Nó được tạo ra bởi Ian Wilmut, Keith Campbell và các cộng sự tại viện Roslin ở Edinburgh, Scotland. Việc tạo ra cừu Đôly đã chứng tỏ rằng một tế bào được lấy từ những bộ phận cơ thể đặc biệt có thể tái tạo được cả một cơ thể hoàn chỉnh. Quy trình nhân bản được thể hiện ở sơ đồ sau:

Vào năm 2003, khi được sáu tuổi, Đôly mắc một chứng bệnh phổi phức tạp vốn chỉ thấy có ở những con cừu nhiều năm tuổi và người ta phải làm nó chết một cách nhẹ nhàng. Cái chết sớm của cừu Đôly có thể phản ánh một sự tái lập trình hoá không hoàn toàn của nhân gốc được chuyển.

Việc tạo ra cừu Đôly là thành tựu của việc ứng dụng công nghệ nào?

Read the following passage about urban shift and mark the letter A, B, C, D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

[I] Sperm whales are fascinating creatures. [II] They possess the biggest brain of any species, six times larger than a human’s, which scientists believe may have evolved to support intelligent, rational behavior. [III] They’re also highly social and capable of making decisions as a group. [IV] But there’s also a lot we don’t know about them, including what they may be saying to one another when communicating with a system of short clicks, known as codas.

Now, new research published in Nature Communications today suggests that sperm whales’ communication is actually much more expressive and complicated than was previously thought. A team of researchers led by Pratyusha Sharma at MIT’s Computer Science and Artificial Intelligence Lab (CSAIL) working with Project CETI, a nonprofit focused on using AI to understand whales, used statistical models to analyze whale codas and managed to identify a structure to their language that’s similar to features of human language. Their findings represent a tool future researchers could use to decipher not just the structure but the actual meaning of whale sounds.

For the study, the researchers examined recordings of 8,719 codas from around 60 whales collected by the Dominica Sperm Whale Project between 2005 and 2018, using a mix of AI algorithms for pattern recognition and classification. The AI then turned the clicks within the coda data into a new kind of data visualization called an exchange plot, revealing that some codas featured extra clicks. These extra clicks, combined with variations in the duration of their calls, appeared in interactions between multiple whales, which they say suggests that codas can carry more information and possess a more complicated internal structure than we had previously believed.

The team’s next step is to build language models of whale calls and to examine how those calls relate to different behaviors. They also plan to work on a more universal system that could be used across species, says Sharma. Taking a communication system we know nothing about, working out how it encodes and transmits information, and slowly beginning to understand what’s being communicated could have many purposes beyond whales. “I think we’re just starting to understand some of these things,” she says. “We’re very much at the beginning, but we are slowly making our way through.”

Which of the following best summarizes the passage?

Xét vị trí tương đối của hai đường thẳng \({{d}_{1}}:\frac{x}{3}-\frac{y}{4}=1\) và \({{d}_{2}}:3x+4y-10=0\).

Theo quy định pháp luật, mọi công dân đều có nghĩa vụ bảo vệ môi trường - điều này thể hiện công dân bình đẳng về điều gì?

Cho tập hợp A = $\{x \in \mathbb{N}$ | $x$ là ước chung của $30$ và $54\}$. Tập $A$ viết bằng cách liệt kê các phần tử 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.

Dear Jamie,

a. I loved our music class today because we learned about protest songs from different times.

b. Bob Dylan became famous in the 1960s when he wrote songs about war and peace that changed how people thought about important problems.

c. Our teacher wants us to pick one protest song for our project, so can we meet at the library on Saturday to work together?

d. Modern artists now use computers to turn climate data into musical notes, so when pollution levels rise, the music gets higher and louder.

e. Old folk singers used simple guitars and strong words to fight for better working conditions in factories and farms.

Your friend,

LK

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.

Here are some ways to help reduce global warming. Which of these do you regularly do?

Don't use private cars. Your willingness to walk or cycle to nearby places can help reduce the emissions of carbon dioxide and also reduce your own carbon footprint. Use public transport. If travelling long distances, then use public transport rather than your car. However, if you carpool (travel together with a group of people in one car), then you are choosing to help ___(7)___ environment. If we travel with ___(8)___, we will use less petrol.

Make a decision to reduce, recycle, and reuse. Reduce waste by buying reusable products. Don't forget to recycle plastics, glass, and paper products. You may wish to reuse some of your old items to ___(9)___, too. Take unneeded ___(10)___ to a recycling centre.

Buy local goods. When you buy goods ___(11)___ from far-away places, it takes a lot of energy to ___(12)___ them to your area. This means that if you don't buy local food and products, then more emissions of carbon dioxide will happen during the transportation process.

(Adapted from English Discovery)

Sâu đục thân ngô:

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

Con hãy lựa chọn đáp án Đúng hoặc Sai

Đỗ Phủ là nhà thơ nổi tiếng của nhà Thanh, đúng hay sai?

Trong các mệnh đề sau, mệnh đề nào đúng? 

Cho các nguyên tử sau: F (Z = 9); P (Z = 15); C (Z = 6); Cl (Z = 17); Al (Z = 13). Những nguyên tử nào có cùng số electron lớp ngoài cùng?

Chọn từ Hán Việt trong những từ ngữ sau.

Điều nào sau đây là sai: Động năng của vật phụ thuộc vào

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer.

Why are we always pointing to Instagram as the cause of mental illness in our teenagers? It’s frustrating that abusive relationships, and the trauma they cause, are rarely mentioned in discussions about the prevalence of mental health problems in young people. Research by Women’s Aid and Cosmopolitan has found that a third of teenage girls have been in an abusive relationship. And, if that isn’t shocking enough, when the remaining two-thirds were asked further questions, it emerged that 64% of them had, in fact, experienced abusive behaviour – they just didn’t realise it was abuse.

Domestic abuse is normally associated with women cowering on the floor, as a violent husband waits to strike, or mothers covering up their black eyes with concealer before the school run. On the same day that the domestic abuse bill received its second reading in parliament, Age UK called for action to tackle domestic abuse of over-60s, whose needs it says are often overlooked by the law, policy and practice. The needs of teenagers in the heady throes of first love who are in emotionally abusive relationships also need to be recognised.

Common themes of such relationships include (though are not limited to) excessive jealousy, repeated criticism and sexual coercion. If your boyfriend or girlfriend is checking your phone, constantly asking to know your whereabouts, getting upset when you spend time away, turning up unannounced to surprise you, these are all examples of coercive control. If they never apologise in an argument and make everything your fault, tell you what you can and can’t wear, undermine you and/or publicly humiliate you under the guise of a “joke”, these again are common instances of controlling behaviour. Ditto, if they have a Jekyll/Hyde personality, make you feel like you are walking on eggshells even when things are seemingly going well, and threaten to hurt themselves if you leave. When it comes to sexual coercion and rape, examples include making you feel pressured to perform sexual acts you’re uncomfortable with, such as sending nude photos, having sex before you’re ready, being pressured to re-enact extreme sex from porn films or being told you don’t love them if you say no.

Often the victim in an abusive relationship can never quite put their finger on one thing, but the overwhelming feeling is of a general unease, feeling unsafe, defective, wrong, scared and as if you are going crazy. It’s your “yourselfness” that’s being consistently undermined, controlled and attacked by the person who claims to love you.

Which of the following is closest in meaning to “prevalence” as used in the passage?

Sự thất bại của các phong trào đấu tranh đầu thế kỉ XX đã để lại bài học kinh nghiệm gì cho các cuộc đấu tranh giai đoạn sau?

Cho hàm số \(f\left( x \right)\) xác định, có đạo hàm trên \(\mathbb{R}\) và \(f\left( 0 \right)=2\). Khi đó, đạo hàm của hàm số \(g\left( x \right)=f\left( x \right)\). \(\text{sin}x\) tại \(x=0\) bằng: