Cho hai địa điểm A và B cách nhau 144 km, cho hai ô tô chuyển động cùng chiều, cùng lúc từ A đến B, xe một xuất phát từ A, xe hai xuất phát từ B. Xe từ A có v₁, xe từ B có  $v_2=\frac{v_1}{2}$ . Biết rằng sau 90 phút thì 2 xe gặp nhau. Tính vận tốc mỗi xe.

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)

Read the following passage about Unconventional Teachers Who Changed Lives 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.

Traditional education focuses on textbooks, but some teachers go beyond these limitations. Mrs. Rodriguez transformed her classroom into a living laboratory. Her students conducted experiments with plants and simple machines. She believed hands-on learning creates deeper understanding than reading alone. When asked why she taught differently, she replied, "I want students to fall in love with discovery." Her methods helped struggling students improve and develop passion for science.

Mr. Jackson abandoned lectures for storytelling and role-playing. His students experienced history by acting out important moments. This approach made history come alive and helped them remember key information. One student said, "Before Mr. Jackson's class, I thought history was boring, but he showed us it's fascinating." He took classes to historical sites and invited veterans to share experiences. These connections helped students understand how past shapes our present.

In a remote village, Ms. Chen taught English without proper textbooks. She created materials using newspapers and song lyrics. Despite limited resources, her students achieved remarkable results through her dedication. "Learning should be joyful, not painful," she told questioning parents. Ms. Chen organized conversation clubs and pen pal exchanges. These activities gave students practical language skills and confidence to use English in real situations.

Coach Williams was a life mentor who taught valuable lessons through sports. He focused on teamwork and fair play rather than winning. Students who struggled academically often excelled in his class. "The playing field is where children learn who they truly are," he explained. He created inclusive activities for all students regardless of athletic ability. Many former students credit him with teaching life skills like resilience and cooperation that helped them succeed after graduation.

In which paragraph does the writer mention Coach Williams taught valuable life lessons through physical education?

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.    Lisa: Yes, I love chocolate ice cream! What about you?

b.    Tom: I like vanilla ice cream, but I eat it only on sunny days.

c.    Tom: Hello! Do you like ice cream?

Trong các khẳng định sau, khẳng định nào đúng?

Nền kinh tế nước ta gồm mấy chủ thể cơ bản?

Nguyên tử nguyên tố carbon (C) có 6 proton. Số electron trong nguyên tử carbon là

Phát biểu nào dưới đây không đúng với đặc điểm tự nhiên của vùng Trung tâm Hoa Kì?

Hành vi của bà K trong tình huống dưới đây đã vi phạm quyền nào của công dân?

"Chị H và gia đình chị đều theo đạo Y. Đến khi lấy chồng, chị không muốn theo đạo Y để theo đạo P, cùng với đạo của chồng chị. Khi biết tin, bà K (mẹ chị H) không đồng ý, và ra sức ngăn cản. Bà K còn tuyên bố sẽ không gặp mặt chị H nữa nếu chị quyết tâm từ bỏ tôn giáo Y. Trong khi đó, ông M (bố chị H) không ngăn cản vì ông cho rằng, đây là quyền tự do của công dân, không ai có thể ngăn cản người khác theo hoặc không theo tôn giáo nào".

Ampe kế có giới hạn đo là 50 mA phù hợp để đo cường độ dòng điện nào dưới đây?

Đối với những hành vi vi phạm đạo đức trong kinh doanh, chúng ta cần làm gì?

Đặc điểm nào không đúng với nền kinh tế Liên bang Nga?

Đâu là ý đúng: Bước đầu tiên của phương pháp lai tạo giống thuần chủng là gì?

Nguyên tử Z có 9 proton và 10 neutron. Nguyên tử Y có 10 proton và 10neutron. Phát biểu nào dưới đây về X và Y là đúng?

Vấn đề nào sau đâu thuộc về tài chính cá nhân?

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.  

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

Cho một máy bay lên thẳng có khối lượng 5.10³ kg, sau thời gian 2 phút máy bay lên được độ cao là 1440 m. Lấy g=10 m/s². 

Công của động cơ khi máy bay chuyển động nhanh dần đều là X.10⁶ J. Tìm giá trị của X (làm tròn kết quả đến chữ số hàng phần mười).

Tính diện tích hình phẳng được giới hạn bởi các đường \(y={{x}^{2}}+x-1\),\(y={{x}^{4}}+x-1,x=-1,x=1\)  (làm tròn đến hai chữ số thập phân)

Có tất cả bao nhiêu loại kế hoạch tài chính của cá nhân?

Trong những năm chiến tranh thế giới thứ nhất tư sản Việt Nam đã làm gì để vươn lên và xác lập địa vị chính trị nhất định?

Chọn ý đúng: Theo Đacuyn, sinh vật thích nghi hợp lí với môi trường sống là do?